What does this mean?

i had this dream a few days ago: i was in hershey, PA. at some sort of marathon event, or racewalk. and there was a HUGE crowd of people. airplane noises could be heard in the distance,getting nearer and nearer. and soon, there were 20-30 bomber planes, not of the US army, but i umed a terrorist group.. and they started dropping bobs on the crowd, a few were killed, but many somehow survived, including myself. the weirdest part is the media just ignored it, as if nothing happened.