Iranian scientists' charges dismissed after prisoner swap

After an Iranian scientist was released over the weekend as part of a prisoner exchange, federal prosecutors on Wednesday dismissed charges against two of his former students who were accused along with him of violating trade sanctions.Iranian officials on Saturday handed over Chinese-American graduate student Xiyue Wang, who had been held on widely criticized espionage charges, in exchange for Iranian scientist Masoud Soleimani.Soleimani had faced federal charges in Georgia accusing him of viol