When Obama was contemplating an attack on Assad, he was advised to go SMALL on one target like Trump's single airfield target . Orr go BIG and takeout all of Assad's war making and strategic facilities  with hundreds of missles followed by bombing to takeout the leftovers. If you go small Obama was told, he was committing to a dpolomatic process of negotiating with Russia, but from a position of strength. IF he went big,  Obama would be committed to taking out Assad in supporting a replacement.  Obama opted for BIG and backed out.  So Trump has made small step to establish our willingness for a military approach, but now must negotiate to work to a solution to Syria and Assad with Russia.  Russia will build its arms in Syria during negotiations making another military attack by the USA less likely and dangerous.