President Barack Obama leads a toast to Iraq veterans being honored during "A Nation's Gratitude Dinner," hosted by President Obama and First Lady Michelle Obama at the White House Feb. 29, 2012. The dinner included men and women in uniform from all ranks, services, states and backgrounds, representative of the many thousands of Americans who served in Iraq and was an expression of the nation's gratitude for the achievements and enormous sacrifices of those who served there and of the families who supported them.