The question for US is how to make sure that no shots will ever be fired from Syria on Israel

"According to a source privy to the talks between the Obama administration and the rebel Supreme Military Council, a decision on how to transfer the arms could be made within one week. "The question is not who they provide the weapons, but what [is] the mechanism?" said the source. One of the key hurdles slowing down the process is the question of how to ensure the weapons are used against the regime and not stockpiled for after Assad falls."