The Hit by David Baldacci

The second book in the Will Robie series.  In this one, a colleague of Wills, Jessica Reel, has killed her spotter instead of the target.  Then she kills the DD, the number 2 man at the CIA Special Operations.  Will is assigned to find her and try to bring her in or execute her.  She misses killing a FISA judge.  Robie is called to the new DD’s house which is being protected by only two bodyguards.  They come under attack and Robie tries to get her out of the estate.  She is hit by one of the bullets and as Robie is sure he won’t make it Reel comes to his rescue.\

Robie tracks Reel down by looking for someone she is also looking for, there is a firefight from a radicalized militia and this time Robie comes to her rescue.  When he confronts her she raises more questions than answers.

Ultimately this exposes a deep government conspiracy that is trying to alter the world order in the Middle East.  The two killers save the day and the terrorists are stopped.  For this they receive the highest medal from the CIA.  But the head of the CIA wants them dead.