a love tap. let s start somewhere else. in ohio, a man there, an american facing terrorism charges this morning. investigators say he trained overseas and returned home intent on attacking americans. it s the kind of homegrown terror plot feared by most law enforcement. here s abc s pierre thomas. reporter: the fbi says this 23-year-old american had returned to the u.s. wanting to do something big. including going to a texas military base to kill american soldiers execution style allegedly inspired by isis, abdirahman sheik mohamud left columbus, ohio, last april with a one-way airline ticket to greece but during a layover in turkey, he disappeared, slipping into syria. the fbi says once there, he joined an al qaeda affiliate. training in weapons, breaking into houses, explosives, and hand to hand combat. perhaps most disturbing, prosecutors claim, a cleric in syria directed him to return to the united states and carry out an act of terrorism.