US President Barack Obama knew about the FBI operation to smash an alleged Russian spy ring before meeting President Dmitry Medvedev last week, but did not raise it at the talks, an aide said. But the White House said the revelations, which were condemned by Russia, would not interfere with the effort by both sides to 'reset' their relations, which has been pursued ever since Obama took office last year. The alleged operation was busted just a few days after a warm summit between Obama and Medvedev at the White House at which both sides made an elaborate effort to...