dennis murphy, "dateline" nbc. >> the secret life of the homecoming queen airs tonight on "dateline"t 9:00 eastern, 8:00 central right here on nbc. >>> this morning, two astronauts took what is expected to be the last spacewalk ever made from the shuttle "atlantis." replacing old batteries on the insurance space station. "atlantis" undocked from the space station on sunday for its final journey home into retirement. >>> it is now five minutes past the hour. let's go outside for a check of the weather. mr. al roker, hey. >> the script is still hanging out, hugging, taking pictures, hanging out with their fans. these guys really know how to get it done. we like them. let's check your weather, see what's happening. we've got some wet weather working its way through the gulf coast states, also on up into upper mississippi river valley, ohio river valley, wet weather stretching from detroit, chicago, minneapolis, risk of some strong storms from indiana all the way down into alabama, also out to the west. showers and mountain snows in the pacific northwest. sunny and hot throu >> hi, thin