Former U.S. Army officer Dan Choi is led by a U.S. Park Police officer to a police van after being handcuffed and arrested during a protest over a proposed pipeline to bring tar sands oil to the U.S. from Canada, in front of the White House in Washington, Saturday, Aug. 20, 2011. Choi handcuffed himself to the White House in 2010 as well in protest of "Don't Ask, Don't Tell." (AP)
