President Trump said this week that Iranian-backed Houthi militants in Yemen have been "decimated by the relentless strikes" that he ordered beginning on March 15. But that's not what Pentagon and military officials are privately telling Congress and allied countries. In closed briefings in recent days, Pentagon officials have acknowledged that there has been only limited success in destroying the Houthis' vast, largely underground arsenal of missiles, drones and launchers, according to congressional aides and allies. In just three weeks, the Pentagon has used $200 million worth of munitions, in addition to the immense operational and personnel costs to deploy two aircraft carriers, additional B-2 bombers and fighter jets, as well as Patriot and THAAD air defenses to the Middle East, the officials said.