The US and Bahrain

US Secretary of State Hillary Clinton has condemned the king of Bahrain's murder of his own people, and demanded they "show restraint". That's good, but the US can and should do more. The photo in that Guardian article is clear: those are American tanks occupying Pearl Square. The soldiers who murdered those civilians were armed with American guns, firing American ammunition. If the US doesn't want its allies to murder civilians, maybe it should stop selling them the weapons to do it?