U.S. Marines at Marine Corps Air Station (MCAS) Yuma conduct a ceremony celebrating the Marine Corps’ 246th birthday at MCAS Yuma, Ariz., Nov. 10, 2021. The annual ceremony signified the passing of traditions from one generation to the next. (U.S. Marine Corps photo by Sgt. Jason Monty) - U.S. Marines at Marine Corps Air Station (MCAS) Yuma conduct a ceremony celebrating the Marine Corps’ 246th birthday at MCAS Yuma, Ariz., Nov. 10, 2021.

U.S. Marine Corps Sgt. Maj. Luis A. Galvez, sergeant major, Headquarters and Headquarters Squadron (H&HS), speaks to Marines after a unit run at Marine Corps Air Station Yuma, Ariz., Nov. 9, 2021. The run was in celebration of the 246th Marine Corps birthday and was intended to strengthen esprit de corps and camaraderie amongst Marines and Sailors of H&HS. (U.S. Marine Corps photo by Sgt. Jason Monty) - U.S. Marine Corps Sgt. Maj. Luis A. Galvez, sergeant major, Headquarters and Headquarters Squadron (H&HS), speaks to Marines after a unit run at Marine Corps Air Station Yuma, Ariz., Nov. 9, 2021. The run was in celebration of the 246th Marine Corps birthday and was intended to strengthen esprit de corps and camaraderie amongst Marines and Sailors of H&HS. (U.S. Marine Corps photo by Sgt. Jason Monty)

U.S. Marine Corps Sgt. Maj. Luis A. Galvez (right), offgoing sergeant major, and Sgt. Maj. Hector A. Hernandez, oncoming sergeant major, Headquarters and Headquarters Squadron (H&HS), pose for a photo at Marine Corps Air Station (MCAS) Yuma, Ariz., Nov. 9, 2021. Galvez was the sergeant major for H&HS since June 7, 2019 and is heading to Recruiting Station Milwaukee, Wisconsin. (U.S. Marine Corps photo by Sgt Jason Monty) - U.S. Marine Corps Sgt. Maj. Luis A. Galvez (right), offgoing sergeant major, and Sgt. Maj. Hector A. Hernandez, oncoming sergeant major, Headquarters and Headquarters Squadron (H&HS), pose for a photo at Marine Corps Air Station (MCAS) Yuma, Ariz., Nov. 9, 2021.

The U.S. Operational Test Team has a new commander. Marine LtCol Dave Merritt became the first commanding officer of the UOTT. - The U.S. Operational Test Team has a new commander. Marine LtCol Dave Merritt became the first commanding officer of the UOTT.

Fire Fighters with Marine Corps Air Station (MCAS) Yuma, Ariz. neutralize a simulated gas leak during exercise Desert Plume, Nov. 2, 2021. Desert Plume is a training event that evaluates MCAS Yuma’s ability to respond to a CBRNE/HAZMAT incident quickly and efficiently. (U.S. Marine Corps photo by Cpl. Gabrielle Sanders) - Fire Fighters with Marine Corps Air Station (MCAS) Yuma, Ariz. neutralize a simulated gas leak during exercise Desert Plume, Nov. 2, 2021.