Olympic Doping

On Jan. 11, 2008, Jones was sentenced to six months in prison. After long denying using performance-enhancing drugs, on Oct. 5, 2007, she admitted to taking the designer steroid "the clear" from Sept. 2000 to July 2001. She pleaded guilty to lying to government investigators, and announced her retirement. She returned the five medals she won at the Sydney Olympics and agreed to forfeit all results back to Sept. 1, 2000.

Justin Gatlin

U.S. sprinter Justin Gatlin had his doping ban reduced from 8 years to four on Jan. 1, 2008. The ban is retroactive to April 2006, which means he will miss the 2008 Summer Olympics. In 2006, he tested positive for a banned substance for the second time. Under anti-doping rules, he was supposed to get a lifetime suspension, but special circumstances led to an agreement for an 8-year ban.

Trevor Graham

On Aug. 3, 2006, the USOC banned the N.C.-based track coach from its training centers and training sites. Graham coaches sprinter Justin Gatlin, who disclosed a positive test for testosterone or other steroids and has been involved with at least a half-dozen athletes who have received drug suspensions. There was no announcement about barring Graham from future competitions.

Kostas Kenteris

Greek sprinters Kostas Kenteris, seen here Aug. 18, 2004, and Katerina Thanou pulled out of the Athens Games after they missed a drug test and were later hospitalized following a suspicious motorcycle crash. Kenteris is his country's most celebrated athlete and was Greece's best hope for gold in track at the Athens Games.

Torri Edwards

The U.S. sprinter, seen here during July 16, 2004, Olympic trials in Sacramento, Calif., was knocked out of the Athens Games when an arbitration panel upheld her two-year drug suspension. She tested positive for the banned stimulant nikethamide at a meet in Martinique on April 24, but blamed the result on a glucose supplement she took because she was feeling sick.

Kelli White

The U.S. sprinter, seen here at an Aug. 30, 2003, press conference, was the first athlete to be suspended as a result of the investigation into illegal steroid sales by BALCO, a California lab. She tested positive for the stimulant modafinil during competition in 2003. In May 2004 she accepted a two-year ban on competition, and was stripped of her medals from the past four years.

David Munyasia

The Kenyan bantamweight boxer, seen here at right during a 2003 match opposite India's Diwakar Prasad, was barred from the Athens Olympics after testing positive for the banned stimulant cathine in an out-of-competition test.

Alain Baxter

The British skier, seen here at the Salt Lake City Winter Olympics, Feb. 23, 2002, was stripped of his bronze medal after testing positive for methamphetamine at the 2002 Games. Baxter had taken an over-the-counter nasal decongestant that contains the substance in U.S. -- but not British -- formulations.

Vasily Pankov

The Belarussian hockey player tested positive for the steroid nandrolone and was disqualified from the 2002 Winter Games. Belarus' team doctor, Evgeni Lositski, was banned from the next two Olympics.

Larissa Lazutina

The Russian cross country skier, seen here winning the women's 30-kilometer classic at the Salt Lake City Winter Olympics, Feb. 24, 2002, was later stripped of her gold medal because she tested positive for the performance-enhancing drug darbepoetin.

Izabela Dragneva

The Bulgarian weightlifter, seen here competing at the Summer Olympic Games in Sydney, Australia, Sept. 17, 2000, was stripped of her gold medal in the 105-pound class after testing positive for the weight-loss drug furosemide.

Ivan Ivanov

The Bulgarian weightlifter, seen here competing at the Summer Olympic Games in Sydney, Australia, Sept. 16, 2000, was stripped of his silver medal in the 123-pound class after testing positive for the weight-loss drug furosemide.

Sevdalin Minchev

The Bulgarian weightlifter, seen here competing at the Summer Olympic Games in Sydney, Australia, Sept. 17, 2000, was stripped of his bronze medal in the 137-pound class after testing positive for the weight-loss drug furosemide.

Ben Johnson

The Canadian sprinter, seen here leading the pack during the 100-meter dash finals in the 1988 Seoul Olympics, was stripped of his gold medal and world record at the Games after he tested positive for steroids. It was the most notorious doping case to date, and Johnson was banned from competition for life.

Thomas Johansson

The Swedish super heavyweight, seen here at left wrestling USA's Jeff Blatnick at the 1984 Los Angeles Games, was stripped of his silver medal that year after testing positive for steroids. Johansson returned to win the bronze at the 1988 Seoul Games. Testing for steroids began at the 1976 Olympics.

Rick DeMont

The 16-year-old U.S. swimmer, seen here receiving the 400-meter freestyle gold medal at the 1972 Munich Games, was stripped of the medal after testing positive for the stimulant ephedrine. It was in a drug he'd been taking for asthma. His was one of three medals taken away in 1972. Testing began with the 1968 Games, when one athlete tested positive for alcohol.