PHOTOS: Third annual Challenge 22 event.

Hundreds of walkers showed their support by taking part in the 2.2-mile ruck walk.

Bill Wahl, left, was just one of the Vietnam veterans who received a pin from American Legion State Commander Rick Johnson during the pinning ceremony.

John Fischer of Code 3 America played the Marine Corps hymn as walkers representing in honor of the Marines walked by.

Bob Sussan delivered a speech before the Vietnam veteran pinning ceremony.

World War 2 veteran Gilbert Waganheim honored his 98th birthday — which is on Nov. 18 — at the event. He later shared his birthday cake with Challenge 22 attendees.

Greg Adkins was honored to receive a pin during the Vietnam veteran pinning ceremony.

Members of the U.S. Navy Sea Cadet Corp Lone Sailor Division of Ocoee locked arms in a group huddle after taking part in the ruck walk.

Joey Caballero, left, and Christian Giraldo walked with each other during the ruck walk.

Many attendees took part in the ruck walk representing different military branches. These individuals took part in the walk in honor of the U.S. Marine Corps.

From left: Kenny Ardis, Morgan Lowe, Alessandra Clemente and Murphy the dog enjoyed the ruck walk.

Victor Perea, left, and Richard Marsh took a moment to catch their breaths after running the ruck walk.

Raul Perez recited military cadences as he walked alongside the U.S. Navy Sea Cadet Corp Lone Sailor Division of Ocoee during the ruck walk.

A Vietnam War Memorial Wall was on display at the Hugh T. Gregory American Legion Post 63 throughout the event.

A War on Terror Memorial Wall also was on display at the Hugh T. Gregory American Legion Post 63 during the event.