How can I fix a locked ignition in a 2002 buick regal?

I pulled the keys out of my friends 2002 buick regal, and now the ignition won't turn. The ignition was in the "ON" (not start postion and car not running) postion when the keys were removed.|||you will need to change the ignition lock cylinder. This could be difficult if cylinder will not turn because you may have to turn it to release the holding pin you could try another key or WD-40 Also use care around air bag.|||replace the ignition cylinder.