On July 20, 1944, Wehrmacht officers led by Claus Schenk Graf von Stauffenberg tried in vain to kill Nazi dictator Adolf Hitler with a bomb, overthrow National Socialist rule and end the Second World War. Dozens of those involved were executed or forced to commit suicide. On the 81st anniversary on Sunday, Wegner will give a welcome address at the German government's commemorative event at the Plötzensee Memorial. In the afternoon, the Governing Mayor will take part in the swearing-in ceremony for soldiers of the Bundeswehr in the Bendlerblock.