U.S. President Barack Obama returns to the Oval Office with Secretary of Defense Robert Gates (R) after announcing Gen. David Petraeus will replace Gen. Stanley McChrystal as the top U.S. commander in Afghanistan in the Rose Garden of the White House in Washington on June 23, 2010.    UPI/Roger L. Wollenberg

Photo by: ROGER L. WOLLENBERG

U.S. President Barack Obama returns to the Oval Office with Secretary of Defense Robert Gates (R) after announcing Gen. David Petraeus will replace Gen. Stanley McChrystal as the top U.S. commander in Afghanistan in the Rose Garden of the White House in Washington on June 23, 2010. UPI/Roger L. Wollenberg