The president attended the memorial after touring the scene of last week's tornado, which killed at least 120 people in Missouri.
The president walked through a destroyed neighborhood before attending a memorial service for those killed in Missouri's deadly tornados.
A federal judge declared Jared Loughner not competent after reviewing 95 pages of reports and 18 hours of interviews. Loughner is accused of shooting 19 people in a January shooting spree.
The accused gunman in January's Tucson rampage showed signs of mental instability before the shooting. But his competence to stand trial is a different matter than whether he is mentally ill.
Endeavour flight watchers, including Rep. Gabrielle Giffords, were able to watch the picture-perfect NASA shuttle launch Monday for only 12 seconds because of an unusual situation.
Space shuttle Endeavor, the next-to-last shuttle in NASA's dwindling fleet, was scheduled to depart on its final mission on April 29, but that has been pushed back to at least May 16.
Obama golf shoes: On Sunday the president made an unusual beeline for his West Wing office that raised eyebrows only in retrospect.
Arizona's conservative politics – and Phoenix's dominant role – lead some in Tucson to call for secession. It's a divide that dates back to the 1800s.
Space shuttle launch: the shuttle Endeavour will not launch this week. Canceled first on Friday and rescheduled for Monday, the shuttle Endeavour has been canceled again, due to mechanical problems.
The shuttle launch represents a bookend of sorts for Endeavour: It carried the first US segment of the space station in 1998 and it will deliver the last US piece of major hardware now. The Obama family will be among the more than 500,000 viewers.