Regime. they received briefings on options, we're told. and secretary mattis was briefing him. these options had been developed before the trip. they had been presented with a menu of options for some time. and tomahawk cruise missiles make sense. it minimizes the risk to u.s. personnel, if it was a manned aircraft, there's a chance they could be fired upon. this is a standoff weapon. it allows it to be fired from some distance. it allows for the intended effect without putting u.s. forces in danger. there's hundreds of troops already in syria, participating in the fight against isis. they're ...