"America had a secret weapon," writes Steve Call of the period immediately following September 11, 2001, as planners contemplated the invasion of Afghanistan. This weapon consisted of small teams of Special Forces operatives trained in close air support (CAS) who, in cooperation with the loose federation of Afghan rebels opposed to the Taliban regime, soon began achieving impressive - and unexpected - military victories over Taliban forces and the al-Qaeda terrorists they had sponsored. The astounding success of CAS tactics coupled with ground operations in Afghanistan soon drew the attention of military decision makers and would eventually factor into the planning for another campaign: Operation Iraqi Freedom. But who, exactly, are these air power experts and what is the function of the TACPs (Tactical Air Control Parties) in which they operate? "Danger Close" provides a fascinating look at a dedicated, courageous, innovative, and often misunderstood and misused group of military