An official website of the United States Government 
Here's how you know

Official websites use .gov

A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS

A lock ( lock ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Photos

Snapshots of what’s happening in the Defense Department.

Marine Corps Lt. Col. William Sheridan pilots a F-5N above Marine Corps Air Station Yuma, Ariz., July 15, 2016. Sheridan commands the Marine Fighter Training Squadron 401, which is the Marine Corps' only adversary squadron. Marine fighter pilots man the squadron with each averaging well more than 2,500 flight hours in tactical fighter aircraft. Marine Corps photo by Cpl. Conner Robbins

Pilot in Flight

Marine Corps Lt. Col. William Sheridan pilots a F-5N above Marine Corps Air Station Yuma, Ariz., July 15, 2016. Sheridan commands the Marine Fighter Training Squadron 401, which is the Marine Corps' only adversary squadron. Marine fighter pilots man the squadron with each averaging well more than 2,500 flight hours in tactical fighter aircraft. Marine Corps photo by Cpl. Conner Robbins

Photo Gallery