CAPE CANAVERAL, Fla. (AP) — Shuttle Discovery's astronauts wrapped up their few remaining chores at the international space station on Monday, flexing the robot arm belonging to the newly installed Japanese science lab and opening its attic.

The two crews planned on saying "sayonara" today, with Discovery heading out first thing Wednesday morning.

Japan's billion-dollar Kibo lab — which means hope — had the door to its attic swung open. The storage closet, in orbit for three months, was attached to the lab late last week.

In addition, Kibo's robot arm was extended to its full 33 feet, with all six joints tested. At the end of the workout, the arm was folded into a long-term resting position.