ST PETERSBURG, RUSSIA - OCTOBER 31, 2016: An event in memory of the victims of the Kogalymavia Airbus A321 plane crash in Palace Square. On October 31, 2015, Kogalymavia Airbus A321 came down in Egypt's Sinai Peninsula as it traveled from Sharm el-Sheikh to St Petersburg, killing all 217 passengers and 7 crew members on board. Peter Kovalev/TASS (Photo by Peter Kovalev\TASS via Getty Images)