Federal authorities arrested a Jordanian national possibly linked to Mohamed Atta, the mastermind of the Sept. 11 attacks, at a Hollywood train station early Thursday.Mohammed Amin, who sources say has a dozen aliases, was arrested as he boarded an Amtrak train with a ticket to Palatka, a town of 10,000 people 60 miles south of Jacksonville.Federal sources told WTVJ-NBC 6 that Amin's final destination might have been Washington, D.C.When Amin showed up for his 11:01 a.m. train, three FBI agents and two Immigration and Naturalization Service agents were waiting for him.They later transported Amin to Krome Detention Center in Miami-Dade,...