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NASA Gets Back in the Saddle

America's shuttle fleet returns to flight with a successful launch of the Discovery

2 min read

27July 2005--The space shuttle Discovery blasted off its launch pad at the Kennedy Space Center in Florida the morning of 26 July, finally returning the United States' shuttle fleet to flight. The launch follows a two-and-a-half-year grounding of the fleet in the wake of the Columbia disaster.

It had not been a smooth road to the liftoff. Initial concern over the shuttle's readiness pushed the launch from May to July, and a malfunctioning fuel level sensoron 13 July cost NASA another two-week delay.

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Economics Drives Ray-Gun Resurgence

Laser weapons, cheaper by the shot, should work well against drones and cruise missiles

4 min read
In an artist’s rendering, a truck is shown with five sets of wheels—two sets for the cab, the rest for the trailer—and a box on the top of the trailer, from which a red ray is projected on an angle, upward, ending in the silhouette of an airplane, which is being destroyed

Lockheed Martin's laser packs up to 300 kilowatts—enough to fry a drone or a plane.

Lockheed Martin

The technical challenge of missile defense has been compared with that of hitting a bullet with a bullet. Then there is the still tougher economic challenge of using an expensive interceptor to kill a cheaper target—like hitting a lead bullet with a golden one.

Maybe trouble and money could be saved by shooting down such targets with a laser. Once the system was designed, built, and paid for, the cost per shot would be low. Such considerations led planners at the Pentagon to seek a solution from Lockheed Martin, which has just delivered a 300-kilowatt laser to the U.S. Army. The new weapon combines the output of a large bundle of fiber lasers of varying frequencies to form a single beam of white light. This laser has been undergoing tests in the lab, and it should see its first field trials sometime in 2023. General Atomics, a military contractor in San Diego, is also developing a laser of this power for the Army based on what’s known as the distributed-gain design, which has a single aperture.

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