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A 3D-printed Portal turret makes for the perfect watchdog for your very own Enrichment Center.
While we're sure the novelty will wear thin rather quickly, this motion-sensitive, miniaturised Portal turret has all the right moves.
Fans have banded together to create a bunch of Portal turret-themed videos for the unofficial "Turret Week".
The battleship USS Arizona, sunk during the attack on Pearl Harbor, has undergone extensive underwater 3D scanning to preserve this historic monument.
Robotics student builds a turret that talks, tracks movement with a laser-guided system, and fires foam bullets at its target.
From World War II, through Korea, the Cold War, and Desert Storm, the Missouri served her country for 48 years. Take a photo tour of this incredible battleship.
A hidden feature on the video site lets you play the classic arcade game. And boy is it hard.
Since 1978, the Army has depended on this proven vehicle, a 70-ton tank with a 120mm gun. CNET's Daniel Terdiman went to Lima, Ohio on Road Trip 2013 to see how the combat vehicle is made.
Ever fallen in love with a game so hard you didn't ever want to leave it? One Portal fan is living the dream.
Using a motion sensor, Ryan Palser's cool-looking turret even plays a preloaded audio track when someone comes near.