An American journalist jailed in Iran has been convicted of spying and sentenced to eight years in prison, her lawyer said Saturday, dashing any hopes for her quick release. The verdict was the first time Iran has found an American journalist guilty of spying, and it was unclear how the conviction would affect recent overtures by the Obama administration for better relations and engagement with Washington's longtime adversary. Roxana Saberi, a 31-year-old dual American-Iranian citizen, was arrested in late January and initially accused of working without press credentials. But earlier this month, an Iranian judge leveled a far more serious...