Collateral damage seems to correlate with expended firepower. The more you shot, the more you hit - for better or worst.

In the Gulf War, US forces killed a significant number of Americans too. The problem is magnified in coalitions since the coordination across commands is weaker than within a command.

Frankly, I\'m certain we\'re doing the best we can to reduce unintended deaths but no one believes it will be reduced to zero.