Pursuit of Honor (Mitch Rapp #12) by Vince Flynn

The action begins six days after a series of explosions devastated Washington, D.C., targeting the National Counterterrorism Center and killing 185 people, including public officials and CIA employees. It was a bizarre act of extreme violence that called for extreme measures on the part of elite counterterrorism operative Mitch Rapp and his trusted team member, Mike Nash.