u.s. rep. eddie bernice johnson d-dallas argue behead two american journalists isis justify u.s. airstrikes syria thursday interview capitol hill johnson say slay jam foley steven sotloff lead bomb isis force syria grind u.s. think need protect americans wherever americans also need careful say johnson dallas democrat also say president obama need congressional authority escalate fight isis feel would wise seek approval u.s. house senate see entire interview obamabot congresswoman isis behead justify u.s airstrikes video