WASHINGTON—An all-star panel of retired military officers, intelligence agents, and national security experts officially launched the Citizens’ Commission on Benghazi with an all-day conference Monday in Washington. The event, organized by Accuracy in Media, took place at the Heritage Foundation and included panel discussions, public questions, and a speech from Rep. Frank Wolf, R-Va. The 13-member commission finished with a closed door session to discuss its sole purpose: to find the truth about the Sept. 11, 2012, terrorist attack in Benghazi, Libya, that killed Ambassador Christopher Stevens and three other Americans. Speakers charged members of both political parties with incompetence...