WASHINGTON - Debris from an obliterated U.S. spy satellite is being tracked over the Pacific and Atlantic oceans but appears to be too small to cause damage on Earth, a senior military officer said Thursday, just hours after a Navy missile scored a direct hit on the failing spacecraft. Marine Gen. James Cartwright, vice chairman of the Joint Chiefs of Staff and an expert on military space technologies, told a Pentagon news conference that officials have a "high degree of confidence" that the missile launched from a Navy cruiser Wednesday night hit exactly where intended. It was an unprecedented mission...