Alex Cross must die

When an American Airlines plane explodes in the sky, detectives Alex Cross and John Sampson are first on the scene. They don't hear the gun fire. At first. The weapon that took down the plane is a remote-controlled Vietnam-War-era machine gun. The list of those who possess the training and expertise to operate the stolen, .50-caliber weapon is short. And time runs even shorter. But this isn't the only case the pair must solve.