In these dangerous times, the United States is blessed to have extraordinary and selfless men and women willing to step forward and defend us. These young Americans understand that our cause in Iraq is noble and necessary -- and that the advance of freedom is the calling of our time. They serve far from their families, who make the quiet sacrifices of lonely holidays and empty chairs at the dinner table. They have watched their comrades give their lives to ensure our liberty. We mourn the loss of every fallen American -- and we owe it to them to build a future worthy of their sacrifice.