FILE - In this July 27, 2018, file photo, Kahlan, a 12-year-old former child soldier with Yemen's Houthi rebels, demonstrates how to use a weapon at a camp for displaced persons where he took shelter with his family in Marib, Yemen. President Joe Biden's announcement that the U.S. will end its support of a Saudi-led coalition's years-long war against Yemen's Houthi rebels likely will increase pressure on the kingdom to end its campaign there, though reaching an enduring peace for the Arab world's poorest country still remains in question. (AP Photo/Nariman El-Mofty, File)