In this photo provided by the Russian Defense Ministry Press Service, Syrian troops march during a seeing off ceremony for Russian troops at Hemeimeem air base in Syria, Tuesday, March 15, 2016. Russian warplanes and troops stationed at Russia's air base in Syria started leaving for home on Tuesday after a partial pullout order from President Vladimir Putin the previous day, a step that raises hopes for progress at the newly reconvened U.N.-brokered peace talks in Geneva. (Russian Defense Ministry Press Service via AP)