Long-term astronauts face uphill climb

CAPE CANAVERAL, Fla., June 17 (UPI) -- Returning U.S. space station astronauts Carl Walz and Dan Bursch face an uphill climb as their bodies re-adapt to Earth's gravity following a record-long 195-day spaceflight. In time, the sore muscles, dizziness and nausea will diminish. What remains, however, is an exposure to radiation and a limit on how much more time the men can spend in space.