CAPE CANAVERAL, FLORIDA, July 10: Two astronauts left the International Space Station yesterday for a day of maintenance tasks, including installing a power cable needed for a new Russian laboratory due to be installed this year. Veteran NASA astronaut Christopher Cassidy and rookie partner Luca Parmitano, the first Italian to make a spacewalk, left the station’s Quest airlock shortly after 8 a.M. EDT as the orbital outpost sailed about 260 miles over the Arabian Sea. (agencies)