ABC News' Chief Global Affairs Correspondent Martha Raddatz shares remarkable tales of heroism, hope, and heartbreak in her account of "Black Sunday"--a battle during one of the deadliest periods of the Iraq War.

The First Cavalry Division came under surprise attack in Sadr City on Sunday April 4, 2004. Over 7,000 miles away, their families awaited the news for forty-eight hellish hours--expecting the worst. In this powerful, unflinching account, Martha Raddatz takes readers from the streets of Baghdad to the home front and...