The Russian national flag is flown at half-mast on top of the Senate Building in Kremlin on the day of national mourning in Moscow, Russia, Sunday, Nov. 1, 2015. The Russian Metrojet airliner crashed Saturday in a remote mountainous part of Egypt’s Sinai Peninsula 23 minutes after taking off from a popular Red Sea resort, killing all 224 people on board, including 25 children. (AP Photo/Pavel Golovkin)
