Pictures Explosions At The Boston Marathon April 15, 2013 / 3:49 PM EDT / CBS News (credit: Alex Trautwig/Getty Images) Multiple People Injured After Explosions Near Finish Line at Boston Marathon (credit: Jim Rogash/Getty Images) Multiple People Injured After Explosions Near Finish Line at Boston Marathon (credit: Jim Rogash/Getty Images) Multiple People Injured After Explosions Near Finish Line at Boston Marathon (credit: Jim Rogash/Getty Images) Multiple People Injured After Explosions Near Finish Line at Boston Marathon (credit: Alex Trautwig/Getty Images) Multiple People Injured After Explosions Near Finish Line at Boston Marathon (credit: Alex Trautwig/Getty Images) Multiple People Injured After Explosions Near Finish Line at Boston Marathon (credit: Alex Trautwig/Getty Images) Multiple People Injured After Explosions Near Finish Line at Boston Marathon (credit: Jim Rogash/Getty Images) Multiple People Injured After Explosions Near Finish Line at Boston Marathon (credit: Jim Rogash/Getty Images) Multiple People Injured After Explosions Near Finish Line at Boston Marathon (credit: Alex Trautwig/Getty Images) Multiple People Injured After Explosions Near Finish Line at Boston Marathon (credit: Darren McCollester/Stringer/Getty Images) Multiple People Injured After Explosions Near Finish Line at Boston Marathon (credit: Darren McCollester/Stringer/Getty Images) Multiple People Injured After Explosions Near Finish Line at Boston Marathon (credit: Darren McCollester/Stringer/Getty Images) Multiple People Injured After Explosions Near Finish Line at Boston Marathon (credit: Darren McCollester/Getty Images) US-MARATHON-BLAST (credit: JOHN MOTTERN/Getty Images) Multiple People Injured After Explosions Near Finish Line at Boston Marathon (credit: Alex Trautwig/Getty Images) Multiple People Injured After Explosions Near Finish Line at Boston Marathon (credit: Jim Rogash/Getty Images) Multiple People Injured After Explosions Near Finish Line at Boston Marathon (credit: Jim Rogash/Getty Images) Multiple People Injured After Explosions Near Finish Line at Boston Marathon (credit: Jim Rogash/Getty Images) Multiple People Injured After Explosions Near Finish Line at Boston Marathon (credit: Alex Trautwig/Getty Images) Multiple People Injured After Explosions Near Finish Line at Boston Marathon (credit: Darren McCollester/Getty Images) Boston Marathon (credit: WBZ-TV) boston (credit: WBZ-TV) Boston Marathon (credit: WBZ-TV) Boston Marathon (credit: WBZ-TV) Boston Marathon (credit: WBZ-TV) Boston Marathon (credit: WBZ-TV) Boston Marathon (credit: WBZ-TV) Boston Marathon (credit: WBZ-TV)