Staff Sgt. Darrell Wills, data network specialist, 1st Battalion, 7th Marine Regiment, greets his 2-month-old daughter, Katie, during the battalion’s homecoming at Del Valle Field April 23, 2016. 1/7 was deployed as part of Special Purpose Marine Air Ground Task Force-Crisis Response-Central Command 16.1. (Official Marine Corps photo by Cpl. Medina Ayala-Lo/Released) - Staff Sgt. Darrell Wills, data network specialist, 1st Battalion, 7th Marine Regiment, greets his 2-month-old daughter, Katie, during the battalion’s homecoming at Del Valle Field April 23, 2016. 1/7 was deployed as part of Special Purpose Marine Air Ground Task Force-Crisis Response-Central Command 16.1. (Official Marine Corps photo by Cpl. Medina Ayala-Lo/Released)

Maj. Chad E. Craven, commanding officer, Delta Company, Communication Training Battalion, talks to friends and collegues after his retirement ceremony at the base theater April 20, 2016. Craven retired after 24-years of honorable service. (Official Marine Corps photo by Cpl. Julio McGraw/Released) - Maj. Chad E. Craven, commanding officer, Delta Company, Communication Training Battalion, talks to friends and collegues after his retirement ceremony at the base theater April 20, 2016. Craven retired after 24-years of honorable service. (Official Marine Corps photo by Cpl. Julio McGraw/Released)

CChaz, military working dog, chases down Sgt. John Scudder, MWD handler, MWD section, PMO, during a canine demonstration as part of Lifestyle, Insights, Networking, Knowledge, and Skills annual Combined Arms Exercise for Kids at Felix Field April 20, 2016. (Official Marine Corps photo by Cpl. Thomas Mudd/Released) - CChaz, military working dog, chases down Sgt. John Scudder, MWD handler, MWD section, PMO, during a canine demonstration as part of Lifestyle, Insights, Networking, Knowledge, and Skills annual Combined Arms Exercise for Kids at Felix Field April 20, 2016. (Official Marine Corps photo by Cpl. Thomas Mudd/Released)