NYC Tightens Security In Wake Of Brussels Attacks

NYPD officers stand guard in Times Square on March 22, 2016, in New York. New York and Washington stepped up security in the wake of the attacks in Brussels on March 22, deploying counter-terrorism reinforcements and the National Guard to airports and stations, officials said. (JEWEL SAMAD/AFP/Getty Images)

NYC Steps Up Security In Wake Of Brussels Attacks

NYPD officers stand guard in Times Square on March 22, 2016, in New York. New York and Washington stepped up security in the wake of the attacks in Brussels on March 22, deploying counter-terrorism reinforcements and the National Guard to airports and stations, officials said. (JEWEL SAMAD/AFP/Getty Images)

NYC Steps Up Security In Wake Of Brussels Attacks

NYPD officers stand guard in Times Square on March 22, 2016, in New York. New York and Washington stepped up security in the wake of the attacks in Brussels on March 22, deploying counter-terrorism reinforcements and the National Guard to airports and stations, officials said. (JEWEL SAMAD/AFP/Getty Images)

NYC Steps Up Security In Wake Of Brussels Attacks

NYPD officers stand guard in Times Square on March 22, 2016, in New York. New York and Washington stepped up security in the wake of the attacks in Brussels on March 22, deploying counter-terrorism reinforcements and the National Guard to airports and stations, officials said. (JEWEL SAMAD/AFP/Getty Images)

NYC Steps Up Security In Wake Of Brussels Attacks

NYPD officers stand guard in Times Square on March 22, 2016, in New York. New York and Washington stepped up security in the wake of the attacks in Brussels on March 22, deploying counter-terrorism reinforcements and the National Guard to airports and stations, officials said. (JEWEL SAMAD/AFP/Getty Images)

NYC Steps Up Security In Wake Of Brussels Attacks

NYPD officers stand guard in Times Square on March 22, 2016, in New York. New York and Washington stepped up security in the wake of the attacks in Brussels on March 22, deploying counter-terrorism reinforcements and the National Guard to airports and stations, officials said. (JEWEL SAMAD/AFP/Getty Images)

NYC Steps Up Security In Wake Of Brussels Attacks

NYPD officers stand guard in Times Square on March 22, 2016, in New York. New York and Washington stepped up security in the wake of the attacks in Brussels on March 22, deploying counter-terrorism reinforcements and the National Guard to airports and stations, officials said. (JEWEL SAMAD/AFP/Getty Images)

NYC Steps Up Security In Wake Of Brussels Attacks

/File - (credit: Jewel Samad/AFP/Getty Images)

NYC Steps Up Security In Wake Of Brussels Attacks

NYPD officers stand guard in Times Square on March 22, 2016, in New York. New York and Washington stepped up security in the wake of the attacks in Brussels on March 22, deploying counter-terrorism reinforcements and the National Guard to airports and stations, officials said. (JEWEL SAMAD/AFP/Getty Images)

NYC Steps Up Security In Wake Of Brussels Attacks

NYPD officers stand guard in Times Square on March 22, 2016, in New York. New York and Washington stepped up security in the wake of the attacks in Brussels on March 22, deploying counter-terrorism reinforcements and the National Guard to airports and stations, officials said. (JEWEL SAMAD/AFP/Getty Images)

NYC Steps Up Security In Wake Of Brussels Attacks

NYPD officers stand guard in Times Square on March 22, 2016, in New York. New York and Washington stepped up security in the wake of the attacks in Brussels on March 22, deploying counter-terrorism reinforcements and the National Guard to airports and stations, officials said. (JEWEL SAMAD/AFP/Getty Images)

NYC Steps Up Security In Wake Of Brussels Attacks

NYPD officers stand guard in Times Square on March 22, 2016, in New York. New York and Washington stepped up security in the wake of the attacks in Brussels on March 22, deploying counter-terrorism reinforcements and the National Guard to airports and stations, officials said. (JEWEL SAMAD/AFP/Getty Images)

NYC Steps Up Security In Wake Of Brussels Attacks

NYPD officers stand guard in Times Square on March 22, 2016, in New York. New York and Washington stepped up security in the wake of the attacks in Brussels on March 22, deploying counter-terrorism reinforcements and the National Guard to airports and stations, officials said. (JEWEL SAMAD/AFP/Getty Images)

NYC Steps Up Security In Wake Of Brussels Attacks

NYPD officers stand guard in Times Square on March 22, 2016, in New York. New York and Washington stepped up security in the wake of the attacks in Brussels on March 22, deploying counter-terrorism reinforcements and the National Guard to airports and stations, officials said. (JEWEL SAMAD/AFP/Getty Images)

NYC Steps Up Security In Wake Of Brussels Attacks

NYPD officers stand guard in Times Square on March 22, 2016, in New York. New York and Washington stepped up security in the wake of the attacks in Brussels on March 22, deploying counter-terrorism reinforcements and the National Guard to airports and stations, officials said. (JEWEL SAMAD/AFP/Getty Images)

NYC Steps Up Security In Wake Of Brussels Attacks

NYPD officers stand guard in Times Square on March 22, 2016, in New York. New York and Washington stepped up security in the wake of the attacks in Brussels on March 22, deploying counter-terrorism reinforcements and the National Guard to airports and stations, officials said. (JEWEL SAMAD/AFP/Getty Images)

NYC Steps Up Security In Wake Of Brussels Attacks

NYPD officers stand guard in Times Square on March 22, 2016, in New York. (JEWEL SAMAD/AFP/Getty Images)

NYC Steps Up Security In Wake Of Brussels Attacks

NYPD officers stand guard in Times Square on March 22, 2016, in New York. New York and Washington stepped up security in the wake of the attacks in Brussels on March 22, deploying counter-terrorism reinforcements and the National Guard to airports and stations, officials said. (JEWEL SAMAD/AFP/Getty Images)

Security Around New York City Increased Following Terror Attacks In Belgium

New York City Mayor Bill de Blasio is joined by Police Commissioner William Bratton at a news conference in Times Square where the two spoke about a heightened terror alert in New York after attacks in the Belgium capital of Brussels on March 22, 2016 in New York City. Dozens are thought to be killed after numerous bombs were set off in the European capital with at least one suspect blowing himself up at the airport. (Photo by Spencer Platt/Getty Images)

Security Around New York City Increased Following Terror Attacks In Belgium

New York City Mayor Bill de Blasio (right) is joined by Police Commissioner William Bratton as they emerge from the subway for a news conference in Times Square where the two spoke about a heightened terror alert in New York after attacks in the Belgium capital of Brussels on March 22, 2016 in New York City. Dozens are thought to be killed after numerous bombs were set off in the European capital with at least one suspect blowing himself up at the airport. (Photo by Spencer Platt/Getty Images)

Security Around New York City Increased Following Terror Attacks In Belgium

New York City Mayor Bill de Blasio (right) is joined by Police Commissioner William Bratton as they emerge from the subway for a news conference in Times Square where the two spoke about a heightened terror alert in New York after attacks in the Belgium capital of Brussels on March 22, 2016 in New York City. Dozens are thought to be killed after numerous bombs were set off in the European capital with at least one suspect blowing himself up at the airport. (Photo by Spencer Platt/Getty Images)

Security Around New York City Increased Following Terror Attacks In Belgium

New York City Mayor Bill de Blasio (right) is joined by Police Commissioner William Bratton as they emerge from the subway for a news conference in Times Square where the two spoke about a heightened terror alert in New York after attacks in the Belgium capital of Brussels on March 22, 2016 in New York City. Dozens are thought to be killed after numerous bombs were set off in the European capital with at least one suspect blowing himself up at the airport. (Photo by Spencer Platt/Getty Images)

Security Around New York City Increased Following Terror Attacks In Belgium

New York City Mayor Bill de Blasio is joined by Police Commissioner William Bratton at a news conference in Times Square where the two spoke about a heightened terror alert in New York after attacks in the Belgium capital of Brussels on March 22, 2016 in New York City. Dozens are thought to be killed after numerous bombs were set off in the European capital with at least one suspect blowing himself up at the airport. (Photo by Spencer Platt/Getty Images)

Security Around New York City Increased Following Terror Attacks In Belgium

New York City police patrol the new Oculus Path station in lower Manhattan following a heightened terror alert after attacks in the Belgium capital of Brussels on March 22, 2016 in New York City. Dozens are thought to be killed after numerous bombs were set off in the European capital with at least one suspect blowing himself up at the airport. (Photo by Spencer Platt/Getty Images)

Security Around New York City Increased Following Terror Attacks In Belgium

New York City police patrol the new Oculus Path station in lower Manhattan following a heightened terror alert after attacks in the Belgium capital of Brussels on March 22, 2016 in New York City. Dozens are thought to be killed after numerous bombs were set off in the European capital with at least one suspect blowing himself up at the airport. (Photo by Spencer Platt/Getty Images)

Security Around New York City Increased Following Terror Attacks In Belgium

New York City police patrol the new Oculus Path station in lower Manhattan following a heightened terror alert after attacks in the Belgium capital of Brussels on March 22, 2016 in New York City. Dozens are thought to be killed after numerous bombs were set off in the European capital with at least one suspect blowing himself up at the airport. (Photo by Spencer Platt/Getty Images)