Las Vegas beefs up marathon security after concert attack

LAS VEGAS – Las Vegas ramped up security for the annual Rock 'n' Roll Marathon, which was the first major outdoor event on the Strip since the mass shooting.

Tens of thousands of people participated in the race with many wearing T-shirts that read "Vegas Strong," in memory of the Oct. 1 attack.

Some runners who picked up their race packages Thursday at a convention center mentioned defiance, strength and resilience among their reasons to take part on the event less than two months after the deadliest mass shooting in modern US history rattled a city known for its partying atmosphere.