Evidence collected by a young London-based organization called Human Rights Investigations indicates that when Arizona GOP Sen. John McCain went to Benghazi in April to express his support for Libyan rebels, he visited the site at which the rebels publicly beheaded an alleged pro-Gaddafi “mercenary” only weeks before. [ ... ] Arizona senator John McCain, the 2008 Republican presidential candidate, made a surprise visit to Benghazi in order to publicly call for stepped-up American support of the rebellion. McCain spoke glowingly of the rebels and their cause, even saying of the Libyan rebels: “They are my heroes.” Now a new...