CAPE CANAVERAL, Fla. (AP) — NASA has set May 31 for the next space shuttle launch and said that Russia's investigation into last month's rocky landing of its own spacecraft shouldn't interfere.

Senior NASA managers agreed Monday to proceed as planned with Discovery's two-week trip to deliver a Japanese lab to the international space station. A Russian Soyuz ship is always docked there as an emergency "lifeboat" in case the crew needs it.