Michael Yon has a long but interesting post about helicopter combat in Iraq:

Sometimes I sit up on a hill and watch them in the air. The other day two Kiowas were screaming low right over the rooftops and doing hard turns. I couldn’t see the combat because they were too far away, but I knew they were toe to toe and there was plenty of shooting going on or they wouldn’t have been flying so violently. It’s scary watching them because I’ve met them and know they are mortals doing the work of immortals. At any second there could be a fireball. A “fallen angel.” I remember the call over the radio last year of a “fallen angel” down by Baghdad. All aboard had been lost.