Russian police officers block an entrance of a hall due to a bomb threat which interrupted presenting opposition activist, Ilya Yashin's report on Chechen leader Ramzan Kadyrov, in Moscow, Tuesday, Feb. 23, 2016. Russian opposition activist Ilya Yashin's speech was interrupted by a bomb threat and police moved to clear the hall. An unidentified protester threw replica U.S. dollars at Yashin, suggesting perceived U.S. support for the Russian opposition. (AP Photo/Alexander Zemlianichenko )