What does this dream mean?

I had a dream last night in which i am at work with a friend of mine. The friend is in real life a girl i used to work with a long time ago and have recently reestablished contact with, although we no longer live close. In the dream we leave work together to go get some lunch...We work at an Air Force Base and are walking down the sidewalk at lunch...we look up and see an aircraft...like an F-16 fall out of the sky into the building we work in...as we start to go to help...i wake up...