Enemy Unidentified

Terror strikes out of nowhere... ...And the Blackhearts might be the only ones who can act. But who are they fighting?
In a single, blood-soaked afternoon, coordinated attacks kill hundreds across the Southwest. The attackers are trained, well-equipped, and coordinated. They issue no demands. No one takes credit. But they have hostages. With a standoff turning bad on an oil rig in the Gulf of Mexico, players behind the scenes turn to John Brannigan and his deniable band of mercenaries to cle...