He was conducting route-clearing operations at the time of the accident.
The mayor said U.S. Army Spc. Miguel Villalon's death was "personal" to him.
An investigation is underway into events surrounding the Jan. 5 attack at Manda Bay Airfield in coastal Kenya.
The death of the soldier, who was not identified, happened near Eloy, Ariz.
Two more soldiers were wounded in the blast.
Nawres Waleed Hamid died on Dec. 27 at a military base near Iraq's northern city of Kirkuk, where he worked as a linguist.
Dustin Harrison was one of three people killed when their base was overrun by insurgents.
Spc. Henry Mayfield Jr., 23, was among the three Americans killed in the early morning attack.
The attack involved as many as 30 rockets fired at the Iraqi military compound near Kirkuk.
Organizations like the Army Survivors Advisory Working Group are trying to make a difference for Gold Star Families.