breaking down the terror threat at home and around the world. welcome back to "early start." i'm christine romans. >> i'm john berman. a naturalized and american citizen back from terror training in it syria with plans to attack on u.s. soil. the man is in custody charged with terrorist threats and lying to the fbi. our justice reporter evan perez is in washington with the latest. >> reporter: mohamud is the terrorist threat that the officials have warned us about for months. an american traveling overseas to fight for the al qaeda group and returning to home. the 2-year-old resident of columbus ohio provided support to the terrorist group. the fbi says mohamud became a u.s. citizen last year. in april of 2014 he flew to greece with plans to make his