A mile away. That's about the same distance some people walk if they park in the back of one of the Pentagon parking lots just to get to their office inside. At least it seemed like that when I worked there in the early-mid '90s.

The distance was so long that when I had a ruptured Achilles Tendon (and was on crutches) the doctor got me a handicapped parking pass so it only took me about 25 minutes to get in and to my desk.

Sorry about your mugging. I was lucky. I was never mugged in my 5 years at the Pentagon. Someone did try to car-jack me though. I lived in USAF base housing in Landover MD - on the same road as the then "Jack Kent Cook Stadium (Redskins Stadium). The geniuses in charge built 3200 new houses in one of the worst neighborhoods (note the emphasis) around the DC metro area - and did not fence it in. There were constant burglaries, although they never got me. They did hit our neighbors though.

I worked part time at Arlington National Cemetery when I got off work at 3pm from the Pentagon, primarily so I could skip DC traffic. I used to shortcut through Southeast DC to get to Landover (NEVER DO THAT), and ended up getting a red light one night about 930pm (I locked the gates at the Cemetery and went home at 9pm most nights). Some dude came up, tried the door, and put his hands on my window to try to pull it down. I couldn't have a gun there, but I did have a rather large knife in my door - which ended up inches from his eyes. He jumped back and I ran the red light. From then on I took 110 to 495. I was fully prepared to slice his fingers on my window, but fortunately I didn't have to. That would've been a long night at the police station.