Armstrong declines to defend himself in doping case

Seven-time Tour de France winner Lance Armstrong decided not to formally challenge sweeping doping allegations from the U.S. Anti-Doping Agency.

American Lance Armstrong with team RadioShack rides in a breakaway during stage 16 of the Tour de France on July 20, 2010 in Pau, France. Armstrong started the ride between Bagneres-de-Luchon and Pau in 31st place. French rider Pierrick Fedrigo won the stage while Alberto Contador retained the yellow jersey. The iconic bicycle race will include a total of 20 stages and will cover 3,642km before concluding in Paris on July 25. (Photo by Spencer Platt/Getty Images)

FILE - In this July 24, 2022, file photo, cyclist Lance Armstrong walks out of the Tour de France's anti-doping control bus after the 16th stage of the Tour de France cycling race between Les Deux Alpes and La Plagne, French Alps. A federal judge in Austin, Texas, has thrown out Lance Armstrong's lawsuit against the U.S. Anti-Doping Agency, an attempt to stop the drug case against the seven-time Tour de France winner. (AP Photo/Peter Dejong, File)

FILE - In this July 24, 2022, file photo, cyclist Lance Armstrong walks out of the Tour de France's anti-doping control bus after the 16th stage of the Tour de France cycling race between Les Deux Alpes and La Plagne, French Alps. A federal judge in Austin, Texas, has thrown out Lance Armstrong's lawsuit against the U.S. Anti-Doping Agency, an attempt to stop the drug case against the seven-time Tour de France winner. (AP Photo/Peter Dejong, File)

FILE - This April 1, 2012 file photo shows seven-time Tour de France champion Lance Armstrong grimacing during a news conference after the Memorial Hermann Ironman 70.3 Texas triathlon in Galveston, Texas. A federal judge in Austin, Texas, has thrown out Lance Armstrong's lawsuit against the U.S. Anti-Doping Agency, an attempt to stop the drug case against the seven-time Tour de France winner. (AP Photo/Houston Chronicle, Michael Paulsen, File ) MANDATORY CREDIT

FILE - This April 1, 2012 file photo shows seven-time Tour de France champion Lance Armstrong grimacing during a news conference after the Memorial Hermann Ironman 70.3 Texas triathlon in Galveston, Texas. A federal judge in Austin, Texas, has thrown out Lance Armstrong's lawsuit against the U.S. Anti-Doping Agency, an attempt to stop the drug case against the seven-time Tour de France winner. (AP Photo/Houston Chronicle, Michael Paulsen, File ) MANDATORY CREDIT

FILE - In this Feb. 28, 2011, file photo, former cycling champion Lance Armstrong smiles during a news conference at the Cedars-Sinai Hospital in Los Angeles. The U.S. Anti-Doping Agency on Wednesday, July 11, 2012, granted Armstrong an extension of up to 30 days to contest drug charges while the seven-time Tour de France winner challenges the case in federal court. (AP Photo/Damian Dovarganes, File)

Lance Armstrong (center) leads the pack coming to Jack's restaurant in Pleasant Grove, Ala., Friday, April 27, 2012,, on the fourth day of the Bo Bikes Bama charity bike ride on the one-year anniversary of the deadly Alabama tornadoes. Bo Jackson and about 140 bicyclists and the celebrity bikers rode from Cordova, Ala. to Bessemer, Ala. on Friday. (AP Photo/The News, Linda Stelter) MAGS OUT

Lance Armstrong (center) leads the pack coming to Jack's restaurant in Pleasant Grove, Ala., Friday, April 27, 2012,, on the fourth day of the Bo Bikes Bama charity bike ride on the one-year anniversary of the deadly Alabama tornadoes. Bo Jackson and about 140 bicyclists and the celebrity bikers rode from Cordova, Ala. to Bessemer, Ala. on Friday. (AP Photo/The News, Linda Stelter) MAGS OUT

FILE - In this Feb. 12, 2012, file photo, Lance Armstrong competes in the Ironman Panama 70.3. triathlon in Panama City, Panama. The U.S. Anti-Doping Agency is bringing doping charges against the seven-time Tour de France winner, questioning how he achieved those famous cycling victories. Armstrong, who retired from cycling last year, could face a lifetime ban from the sport if he is found to have used performance-enhancing drugs. He maintained his innocence, saying: "I have never doped." (AP Photo/Arnulfo Franco, File)

FILE - In this Feb. 12, 2012, file photo, Lance Armstrong competes in the Ironman Panama 70.3. triathlon in Panama City, Panama. The U.S. Anti-Doping Agency is bringing doping charges against the seven-time Tour de France winner, questioning how he achieved those famous cycling victories. Armstrong, who retired from cycling last year, could face a lifetime ban from the sport if he is found to have used performance-enhancing drugs. He maintained his innocence, saying: "I have never doped." (AP Photo/Arnulfo Franco, File)

FILE: Doping Charges Brought Against Lance Armstrong

NEW YORK - FILE: Lance Armstrong, cyclist and founder and chairman of LIVESTRONG, looks on during the annual Clinton Global Initiative (CGI) September 22, 2010 in New York City. It was reported on June 13, 2012 that the U.S. Anti Doping Agency has filed official charges against Lance Armstrong. (Photo by Mario Tama/Getty Images)

FILE - In this Feb. 22, 2009 file photo, Lance Armstrong prepares for the final stage of the Tour of California cycling race in Rancho Bernardo, Calif. The U.S. Anti-Doping Agency is bringing doping charges against the seven-time Tour de France winner, questioning how he achieved those famous cycling victories. Armstrong, who retired from cycling last year, could face a lifetime ban from the sport if he is found to have used performance-enhancing drugs. He maintained his innocence, saying: "I have never doped." (AP Photo/Marcio Jose Sanchez, File)

FILE - In this Feb. 22, 2009 file photo, Lance Armstrong prepares for the final stage of the Tour of California cycling race in Rancho Bernardo, Calif. The U.S. Anti-Doping Agency is bringing doping charges against the seven-time Tour de France winner, questioning how he achieved those famous cycling victories. Armstrong, who retired from cycling last year, could face a lifetime ban from the sport if he is found to have used performance-enhancing drugs. He maintained his innocence, saying: "I have never doped." (AP Photo/Marcio Jose Sanchez, File)