180719-A-RN349-002 From left to right, Brig. Gen. Pete Helmlinger, U.S. Army Corps of Engineers South Pacific Division commander; Col. Kirk Gibbs, outgoing U.S. Army Corps of Engineers Los Angeles District commander; and Col. Aaron Barta, incoming U.S. Army Corps of Engineers Los Angeles District commander stand at attention during a July 19 change of command ceremony at Fort MacArthur in San Pedro, California.