War crime? who to believe?

The Americans will adopt the same denial stance they they took after a series of 'friendly fire' incidents involving British troops and convoy vehicles clearly marked on the roof with allied markings in the Gulf War. 
It seems to be symptomatic of a country where teenagers can get hold of handfuls of weapons and go on killing sprees in schools and colleges due to insane and antiquated 'right to bear arms' legislation from the declaration of independence written more than 200 years ago.