Las Vegas Shooting - At Least 50 Dead

The attack at an open air concert is the worst mass shooting in recent US history. The gunman, named as 64-year-old local resident Stephen Paddock, was shot dead by police. Also, Catalonia's leader says his government is taking legal action against Spanish police over the violence surrounding Sunday's independence referendum, and three scientists who unravelled how our bodies tell time have won the Nobel Prize for physiology or medicine.

(Photo: Police and rescue personnel gather at the intersection of Las Vegas Boulevard and Tropicana Ave. Credit: Getty Images)