Russian President Vladimir Putin dismissed warnings about a potential terror incident in Moscow just days before gunmen attacked a concert hall in the city on Friday. -snip- Earlier this month, the US embassy in Russia issued a security alert warning about a potential terror attack in Moscow and urged people to avoid crowds, monitor local media for updates, and be aware of surroundings. "The Embassy is monitoring reports that extremists have imminent plans to target large gatherings in Moscow, to include concerts, and U.S. citizens should be advised to avoid large gatherings over the next 48 hours," the March 7...