In one of his last policy speeches as U.S. defense secretary, Robert Gates railed against NATO members' unwillingness to pay their fair shares of the costs of the transatlantic security alliance. Importantly, his remarks went beyond the usual admonition to Europe to come up with more money, zeroing in for the first time on how NATO actually spends its limited defense resources.
"These finding have implications for planetary protection policies for future landed spacecraft," according to the Nature Geoscience report. "Cl-bearing brines are very corrosive and this may have implications on spacecraft design and surface operations."...More
The flight of Apollo 13 in April 1970 was one of the most dramatic events in the history of human spaceflight –- and ultimately one of NASA’s finest hours. For three days, the lives of three astronauts who had been bound for the third lunar landing mission hung in the balance....More
The space shuttle was a magnificent machine, the most capable spaceship ever built. It was also a fragile monster that required an expensive standing army to fly, and punished the slightest inattention to detail in its preparation and operation with fatal results....More