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In this episode of the Engineering Update:

The Navy's robo-tuna
The Navy is experimenting with a 4-foot long unmanned undersea vehicle designed to blend in with marine life and perform military functions. This so-called "biometric" autonomous vehicle not only looks like a fish, but swims like one as well. The "robo-tuna" doesn't rely on traditional means of propulsion like propellers or jets, but it actually swims by flipping its tail.

See: Photos of the Day: The Navy’s robo-tuna

Next generation military helicopter
With an aging fleet of helicopters and an increasingly restricted ability to upgrade old machines, the us government is looking to award a 100 billion dollar contract to the designer of the next generation of military helicopter. In addition to competitors like Sikorsky and Bell helicopter, AVX aircraft is offering a helicopter they claim will be able to reach speeds of 270 mph.

The TSA's new boarding rules
Passengers at certain overseas airports with US-bound flights will have to contend with a new TSA regulation — passengers flying out of these unnamed hubs will be forced to turn on certain electronic devices, like cell phones, to prove they're real and not a threat to the plane. If the device doesn't turn on, it won't be allowed aboard, and the passenger will presumably be hustled off for questioning.

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