Former secretary of state landed Tuesday one night at Washington Reagan National Airport after a first-class flight from Boston . Clinton stared ahead wordlessly , walked and did n't acknowledge questions as Daily Mail Online asked whether she had made mistakes in Benghazi . Deadly attacks , carried out by an affiliate of al Qaeda , claimed the lives of U.S . Ambassador to Libya Chris Stevens and three other US personnel . Special congressional committee investigating circumstances before and after the attacks ; its report will come out during 2016 presidential campaign . Questions remain about Clinton 's alleged failure to protect her diplomatic outpost , and the reasons she cited for the debacle after four flag-draped caskets came home . U.S. intelligence knew at the time that Benghazi personnel were aware they were under attack , but Clinton and other Obama administration officials blamed an out-of-control protest linked to an anti-Islam YouTube video .
Former secretary of state landed Tuesday night at Washington Reagan National Airport after a first-class flight from Boston . Clinton stared ahead wordlessly , walked and did n't acknowledge questions as Daily Mail Online asked whether she had made mistakes in Benghazi . Deadly attacks , carried out by an affiliate of al Qaeda , claimed the lives of U.S . Ambassador to Libya Chris Stevens and three other US personnel . Special congressional committee investigating circumstances before and after the attacks ; its report will come out during 2016 presidential campaign . Questions remain about Clinton 's alleged failure to protect her diplomatic outpost , and the reasons she cited for the debacle after four flag-draped caskets came home . U.S. intelligence knew at the time that Benghazi personnel were aware they were under attack , but Clinton and other Obama administration officials blamed an out-of-control protest linked to an anti-Islam YouTube video .