Russian President Vladimir Putin takes part in a nationally televised question-and-answer session in Moscow, Thursday, April 17, 2014. President Vladimir Putin on Thursday rejected claims that Russian special forces are fomenting unrest in eastern Ukraine, but recognized for the first time that the troops in unmarked uniforms who had overtaken Ukraine's Crimean Peninsula before its annexation by Moscow were Russian soldiers. (AP Photo/RIA-Novosti, Alexei Nikolsky, Presidential Press Service)
Defense Secretary Chuck Hagel greets Polish Defense Minister Tomasz Siemoniak on the steps of the Pentagon. Mr. Hagel and Mr. Siemoniak will host a joint press briefing at 11:15 a.m. The meeting comes just as Poland is preparing to take the lead on a Baltic Air Policing mission that provides security to NATO's Eastern European allies.