The fighters: Americans in combat in Afghanistan and Iraq

Part 1. Storm. Into Afghanistan : G-Monster : Lieutenant Layne McDowell's quick air war

Into the kill zone : Sergeant First Class Leo Kryszewski and the Gauntlet at al-Kaed Bridge

Part 2. Bad hand. The one you hear already missed : Sergeant First Class Leo Kryszewski and the rocket attacks

"In the Navy he'll be safe" : hospital corpsman Dustin E. Kirby and a family at war

Down safe : chief Warrant officer Michael Slebodnik and the air cavalry war in Iraq

G-Monster : Lieutenant Commander Layne McDowell's dream

Part 3. Counterinsurgency. On Al Qaeda's turf : Dustin Kirby and the route Chicago shooting gallery

"I'll fly away" : Chief Warrant officer Mike Slebodnik and the air cavalry in the eastern Afghan Valleys

We're here because we're here : specialist Robert Soto and the ghosts of Korengal Valley

The push : Lieutenant Jarrod Neff and a battle to turn the tide of the war

Part 4. Reckoning. G-Monster : the satisfaction of restraint

The fighter : Gail Kirby's demand.