Whats your thoughts on the American flag being flown at half staff, for say, a policeman being murdered on duty ? or a firefighter dieing fighting a fire ?
IMHO, I dont think it should be at half staff for the examples above.
Heres just a quick link I found: http://www.usflag.org/nffhalfstaff.html
EDIT: let me edit this by saying, that I have upmost respect, for those in our military, and our police/fire personel, they do a job that most wont.