The first barrage of American-led airstrikes nearly two weeks ago hit nearly 30 locations in Yemen, destroying around 90 percent of the targets struck, Pentagon officials said. On Monday night, the United States and Britain struck nine sites in Yemen, hitting multiple targets at each location. But officials say they will continue to try to hit mobile targets as analysts search for more fixed targets. The Houthi mobile maneuvers worked so well against Saudi Arabia that the Marines began an experimental effort to copy them. The post How a Ragtag Militia in Yemen Became a Nimble U.S.