Again, sorry for your loss, but I agree with NYC.
You know that the plane took off with your friend on it, but where that plane ended up is the mystery. The lack of plane debris here's what bothers me as well as the seemingly perfect angle the supposed plane hit.
I spoke to a friend whose ex-husband worked in the "P", and he just told her "not a plane" but wouldn't discuss it further.
I had a friend who was near ground zero at the twin towers and heard a series of explosions, detonations right before the towers collapsed.
Buildings don't fall straight down - not without help. If I punch you in the face, you are going to fall over, and if you're 6 feet tall you're hitting everything up to 66" from you...but then your arms are going to hit something, too.
The twin towers fell straight down with minimal damage to the surrounding buildings. You can't explain that shit away. The science won't let you believe it