DUBAI, United Arab Emirates — U.S. long-range B-2 stealth bombers launched airstrikes early Thursday morning targeting underground bunkers used by Yemen’s Houthi rebels, officials said. It wasn’t immediately clear what damage was done in the strikes. [time-brightcove not-tgx=”true”] However, it is incredibly rare for the B-2 Spirit to be used in the strikes targeting the Houthis, who have been attacking ships for months in the Red Sea corridor over the Israel-Hamas war in the Gaza Strip. The Houthis’ al-Masirah satellite news channel reported airstrikes around Yemen’s capital, Sanaa, which the group has held since 2014.