Fuel Leak Again Postpones Launch of Space Shuttle Endeavour

NASA postponed the launch of space shuttle Endeavour's STS-127 mission Wednesday because of a leak associated with the gaseous hydrogen venting system outside the shuttle's external fuel tank.Endeavour's next launch opportunity is July 11. This date comes after the end of an orbital sun-angle condition called a beta angle cut-out, which occurs between June 22 and July 10. The cut-out creates a