New Guidelines for Next Shuttle

SPACE CENTER, Houston — Warning that shuttles will never be risk-free, the project chief said today that NASA will impose ultraconservative guidelines on the next shuttle flights and may direct most to landings in California instead of Florida.

But in an address to space agency employees, Rear Adm. Richard Truly promised that the new conservatism will not stand in the way of a “robust” space program once the problems that led to the Challenger disaster have been corrected.