President Joe Biden has approved a Pentagon plan to redeploy up to 500 U.S. troops to Somalia. The move largely reverses a withdrawal ordered by then-President Trump during his final days in office. The Pentagon says the troops are needed to train Somalia’s army to combat al-Shabab militants. The Pentagon’s announcement came just after Hassan Sheikh Mohamud was sworn in as president, a post he previously held from 2012 to 2017.