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.

A circular window frames a testing mask inside a pressurized capsule at the Navy Experimental Diving Unit at the Naval Support Activity Panama City in Florida, July 13, 2016. DoD photo by EJ Hersom

Pressurized Capsule

A circular window frames a testing mask inside a pressurized capsule at the Navy Experimental Diving Unit at the Naval Support Activity Panama City in Florida, July 13, 2016. DoD photo by EJ Hersom

Photo Gallery