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 sailor inserts a cotter pin into a dual-bell receiver.

Inserting a Cotter Pin

Navy Petty Officer 3rd Class Shaynalei Castillo inserts a cotter pin into a dual-bell receiver aboard the aircraft carrier USS Theodore Roosevelt during a replenishment at sea with the USNS Guadalupe in the Indian Ocean, March 29, 2018. Castillo is a boatswain’s mate. Navy photo by Seaman Michael Hogan

Photo Gallery