WASHINGTON - An 18-year-old man who authorities said planned to fly to Morocco and travel to Islamic State-controlled territory to join the group was arrested in Indiana on Tuesday, the US Justice Department said.FBI agents arrested Akram Musleh, of Brownsburg, Indiana, as he was attempting to board a bus from Indianapolis to New York, from where he planned to fly to Morocco, the department said in a statement."The criminal complaint alleges that he planned to provide personnel (himself) to ISIL," the statement added, referring to the militant Islamist group.If convicted, Musleh faces a maximum sentence of 20 years in prison, a lifetime of supervised release and a $250,000 fine, the statement said.