place for politics. a top u.s. security official said the deadly attack in libya on september 11th where the american ambassador was a terrorist strike. they doubt it started as a spontaneous protest. daniele has more from washington. >> reporter: sitting before the homeland security committee, three top officials called this scene last week, the deadly assault in libya where four americans died. evidence the u.s. continues to be vulnerable to terrorist attacks. much else remains unanswered. was al qaeda involved? >> we are looking at indications individuals may have had connections to al qaeda. >> reporter: was the attack planned like the libyan government insists or spontaneous? >> i just don't think that