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 Defense Advanced Research Products Agency illustration depicts DARPA’s Falcon Hypersonic Test Vehicle as it emerges from its rocket nose cone and prepares to re-enter the Earth’s atmosphere.

Hypersonic Test Vehicle

A Defense Advanced Research Products Agency illustration depicts DARPA’s Falcon Hypersonic Test Vehicle as it emerges from its rocket nose cone and prepares to re-enter the Earth’s atmosphere. DARPA has conducted several test flights of the vehicle in recent years. DARPA illustration

Photo Gallery