After numerous delays, America's most powerful unmanned rocket blasted off Tuesday carrying a spy satellite for the Pentagon.
The Titan 4 thundered into a hazy sky at 11:55 a.m. DST from Cape Canaveral Air Station. It was the fourth launch attempt in less than two weeks.The Air Force had kept the exact launch time secret for security reasons and refused to disclose details about the satellite on board. But some military space observers believe it's an electronic eavesdropping craft.
The 20-story rocket arced out over the Atlantic Ocean and headed to the northeast, skirting the eastern seaboard. Its course had it passing briefly over the eastern tip of Newfoundland.
Air Force officials expected the spent rocket stages to land in the Atlantic more than 200 miles off the Canadian coast.
The first three launch attempts were thwarted by technical problems and bad weather.