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Acting EPA Administrator James Payne sent an email to members of the agency's Science Advisory Board and the Clean Air Scientific Advisory Committee informing them that both are being "reset."

Millions continued to throng the site even as police urged them to avoid the area. Deadly stampedes are relatively common around Indian religious festivals, where large crowds gather in small areas.

Denver-based Boom Technology's XB-1 demonstrator plane hit Mach 1.122 — 750 mph. It's the first independently developed supersonic jet. The company is also working on a supersonic passenger airliner.

While NASA was trying to put a man on the moon, the Navy was quietly conducting a series of tests to see if humans could live and work on the deep seafloor.

Madison Keys was a tennis prodigy, beating Serena Williams when she was just 14 years old, but had not won a grand slam title in her 15 year career.