Monday, March 5, 2007 Tonight on "Nightline," we devote our entire program to one astonishing story of courage and sacrifice from the Iraq War. "Black Sunday," the soldiers called it -- a ferocious ambush in Sadr City, a battle many now believe marked the day and the hour that the Iraqi insurgency really began.

April 4, 2004. Soldiers of the 2-5 Cavalry Battalion, Charlie Company, are on a routine patrol in Sadr City. Suddenly, gunfire erupts from every direction. Commanders lead the men to an alley for cover. And a nonstop firefight ensues as the Americans fend off wave after wave of attackers, and their comrades back at Camp War Eagle try to fight their way through to rescue them. Eight GIs are killed, more than 70 wounded. And the lives of the men who survive are forever changed.

Back home in Texas, it's Palm Sunday. And the families of the men half a world away begin to hear of the battle and begin a journey of fear, hope and recovery as they await news of their loved ones.

Our colleague Martha Raddatz, who has covered Iraq with guts, intelligence and heart like no one else, began reporting this story for "Nightline" in 2004. She's talked to the men who fought the battle and to their families, who waited for word at home.

Now Martha has written a widely acclaimed book called "The Long Road Home."

Her reporting tonight for us on this fierce and critical battle in Baghdad will move you, inspire you and give you a vivid sense of the human experience of war, on the battlefield and on the home front. It is, in short, an unforgettable tale.

We hope you can join us,

Terry Moran and the "Nightline" Staff

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