Colorado remembers victims of 9/11 attacks 15 years later

DENVER -- Colorado paid tribute to the victims of the 9/11 terrorist attacks with a remembrance ceremony in Denver's Civic Center Park on Sunday.

The ceremony included a five-canon salute, a speech by the governor and a free concert with John Fogerty and Big Head Todd and the Monsters.

"We wanted to bring our grandson because he wasn't born at the time of the attack," said Dawn Lanford. "We wanted him to know the importance of our flag and how lucky we are to be free today."

First responders and military personnel led a 9/11 remembrance processional from the Colorado State Capitol to the Denver City and County building.

"We mourn those who died on that fateful day," said Gov. John Hickenlooper. "And those who died protecting our freedoms."

High above Sunday's celebration, police officers staged on some downtown buildings were a reminder of the continued threat.