Victims of last month's Germanwings plane crash will be remembered at a national memorial taking place on Friday at Cologne Cathedral in western Germany. German Chancellor Angela Merkel and President Joachim Gauck are due to attend. Co-pilot Andreas Lubitz appears to have "deliberately" crashed the plane into the French Alps after locking his captain out of the cockpit, killing 150 people on March 24, 2015.VIDEOGRAPHIC
