Splintered Sky — Don Pendleton

America's elite defense unit works under the radar and outside the law to stop terror before it hits America's streets. But with each new crisis, Stony Man's cyberwizards understand that the new battlefield is deep space. Someday, a superweapon may be impossible to stop. With luck, that day won't come, thanks to Stony Man's field teams bringing the fight to the enemy, face-to-face....

An invisible enemy plots to launch a dirty bomb from orbit, exposing vulnerable cities to hard radiation. Intel points to a multinational terror force bent on controlling the skies over the free world. Suddenly the Farm is on a hunt for a threat that could shake the entire planet. From deep-cover penetration of hostile Red China to an emergency rescue flight to save the International Space Station, the covert commandos are pushed to the limit, especially when they have to prevent a suicide crash of a knockoff shuttle into New York City--a collision that would turn the city into a smoking crater.