Here i believe this is what your looking for:
second explosion Pentagon, FOX, 10:10, 9/11
http://www.youtube.com/watch?v=z0DZPTsS4Ao
And here is even more evidence from eyewitnesses to
help corroborate the fact that there was a massive explosion
at the pentagon around 10:10 am that day.
In the 911 Pager Messages I found two messages that say there were two explosions, the time of one of the messages is around 10:13 AM. The other is from people in the Sheraton.
2001-09-11 10:13:33 Skytel [005103509] B ALPHA My dad is on foot walking towards the Pentagon. He just heard another explosion from there. There are also rumors of another explosion in DC.
2001-09-11 11:07:31 Skytel [005202563] A ALPHA Jesus - Both Michael and I are fine ... I was in a training class at the Sheraton PENTAGON .. we felt the explosions (there were 2). Cla