10 things you need to know today: December 26, 2016

1. Russian President Vladimir Putin said Monday would be a day of mourning in his country after a Russian military jet crashed into the Black Sea shortly after taking off from Sochi on a flight to Syria, killing all 92 people on board. The victims included soldiers, reporters, and members of a world renowned Russian army choir, the Alexandrov Ensemble, who were on the way to perform for Russian troops. Russia's transport minister said on Sunday that investigators were considering the "entire spe...