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"The shuttle Discovery's robot arm is undergoing ultrasound inspections after a weekend mishap in which a moveable access bucket bumped into the arm during work to clean up broken glass. <b>Two small indentations were found </b>underneath the arm's insulation blankets and NASA wants to make sure the underlying structure wasn't damaged."<br /><br />"At the same time, engineers are assessing tile damage to the shuttle Endeavour's body flap <b>caused by equipment that slipped off a tray</b> used by workers inspecting the ship's rudder/speed brake."<br /><br />Hey, careful! That stuff costs billions of dollars.