High Velocity: In the wake of the growing number of mass shootings, first responders and emergency rooms are now being trained in combat first aid to save lives. The AR-15-style assault rifle causes devastating wounds similar to those found on the battlefield. Scott Pelley reports on the kinds of injuries caused by those weapons and on the new protocol medical personnel have been forced to adopt as the use of AR-15s in mass shootings becomes more frequent.As Goes Texas: Few political races have the potential to predict America's political future more than the tight race for the U.S. Senate in Texas. Early voting in the state indicates strong interest. Jon Wertheim spoke to incumbent Sen. Ted Cruz (R) and his opponent, Rep. Beto O'Rourke (D), about how heavy voter turnout will affect their chances.The Ride of His Life: Ever since Garrett McNamara rode a 78-foot monster wave to set a then-world record here, the Portuguese town of Nazare has attracted a stream of surfing talent hoping to beat it. Who will ride one bigger? Who will get hurt trying?