Tens of thousands partook in Rock 'N' Roll Las Vegas by running the 5K, 10K, half marathon, or full marathon!
"It was my first time so I'm super excited!" said Mariana Prado of Las Vegas.
Runners described the race as emotional.
For two miles, runners ran in silence while they passed the 1 October site near Mandalay Bay. Runners all looked up as they ran by.
Once they approached the Las Vegas sign, runners described it as an amazing moment.
"It was better than any mile marker, everyone hand their hands up!"
Race finishers admit they did have second thoughts about doing the race after 1 October.
"My husband was scared but I said you know what, we're not going to let people make us scared of running and doing what we love to do," said Chantal Haigh from Montreal. "We're not gonna be cowards. Let them be cowards. We're gonna stand strong and run this race and be proud of who we are."
Security was tighter than ever before. Trucks and busses blocked the intersections. Police officers stood alert with rifles in their hands.
"It's a sign of freedom, honestly it wasn't intimidating or anything," said Haigh. "It was a sign of freedom."
Our own David Schuman ran the half marathon. He finished the 13.1 miles in one hour and 54 minutes!