Blimps to bolster Washington's air shield in test
Friday, February 1, 2013 - 16:40
in Physics & Chemistry
WASHINGTON (Reuters) - A pair of big, blimp-like craft, moored to the ground and flying as high as 10,000 feet, are to be added to a high-tech shield designed to protect the Washington D.C. area from air attack, at least for a while.