The Louisville event coincides with the anniversary of September 11, where hundreds of first responders lost their lives.

Police said there are no known threats, but want people to be aware of their surroundings and look out for anything that may seem out of the ordinary.

Each stop along the remembrance walk is marked with signs and information about 9/11 events and quotes from first responders who survived the attacks. 

Brigadier General T.J. Edwards Jr. gave an emotional address. He was at the Pentagon the day of the attacks.

A portion of the jump park's ticket sales Wednesday will be donated to Middletown Fire and EMS. 

The memorial included a prayer service and flag ceremony to honor the more than 340 firefighters who lost their lives during the Sept. 11, 2001, attacks.