I had wondered why people kept getting violated for going through prohibited airspace...these pretty much clear it up in my head...
first of all here's an overhead map of the area

we were taking off runway 1, the north/south runway on the map
what you have to do as soon as you rotate, you have to start turning left, and go over the potomac, and follow it up to the NW...if you turn too much left, you're into the pentagon prohibited area, if you go straight for more that a few seconds, you're into the prohibited area over the washington monument, lincoln memorial, and the white house...basically this is the worst spot for an airport...
so here we go, here's the look from the runway, and you can see the Washington Monument

so into the left turn after rotation, and here's the view

the side of the pentagon you are seeing is the side hit on 9/11...what we realized is that they had to actually go over Reagan airport less than 100 feet at that max speed in order to hit it
and out the right side

the reflecting pool, the washington monument, "the mall," the white house all in a row, with the lincoln memorial to the south
all in all, a pretty neat experience...I wiish we still had long overnights there so I could go explore stuff