Poignant ceremonies on the beaches of Normandy to commemorate the 80th anniversary of D-Day as President Biden gives an impassioned speech on fighting for freedom that Allies fought and died for. While paying tribute to veterans, Biden stressed the importance of international alliances, warning democracy is facing its greatest risk since World War II. David Greenberg, historian and professor of US history and media studies at Rutgers University about how current threats to democracy add significance to anniversary of turning point in World War Two. New data this week confirms last month was the hottest May ever, marking the 12th straight monthly record high. Experts say it is going to get worse.