James Medina, 40, made his initial appearance in federal court Monday following his arrest last week in the alleged plot against the Aventura Turnberry Jewish Center, which includes a synagogue, school and meeting halls. Medina is charged with attempted use of a weapon of mass destruction ... FBI learned in March that Medina — a Muslim convert who said in court he also goes by James Muhammad — planned to bomb the center by placing a device under a car or throwing it over a wall.