Monday has been declared a day of mourning in Tatarstan - after a passenger plane crash-landed, killing all 50 people on board, including the son of the Russian republic's president. Locals have been bringing flowers to Kazan International Airport to mourn the victims. READ MORE: http://on.rt.com/tk3j3a <br /><br />FOLLOW LIVE UPDATES: http://on.rt.com/x0upfj<br /><br />RT LIVE http://rt.com/on-air<br /><br />Subscribe to RT! http://www.youtube.com/subscription_center?add_user=RussiaToday<br /><br />Like us on Facebook http://www.facebook.com/RTnews<br />Follow us on Twitter http://twitter.com/RT_com<br />Follow us on Instagram http://instagram.com/rt<br />Follow us on Google+ http://plus.google.com/+RT<br /><br />RT (Russia Today) is a global news network broadcasting from Moscow and Washington studios. RT is the first news channel to break the 1 billion YouTube views benchmark.