Published: Feb 26, 2011 8:32 PM EST
Updated: Feb 26, 2011 5:32 PM EST

CAPE CANAVERAL, Fla. (AP) - Space shuttle Discovery has arrived at the International Space Station.

The shuttle docked at the orbiting complex for the last time Saturday afternoon.

After this mission, Discovery will be retired and placed in a museum. This is the 13th time it's flown to the space station.

Station commander Scott Kelly asked Discovery's astronauts what took them so long. The shuttle should have visited last November, but it was grounded by fuel tank cracks. It finally blasted off Thursday, with just two seconds to spare. Discovery's skipper apologized for the delay.

The 12 astronauts will spend at least a week together. Discovery will leave behind a compartment full of supplies as well as the first humanoid robot in space.

(Copyright 2011 by The Associated Press.  All Rights Reserved.)