State of Siege (Tom Clancy's Op-Center, 6)

Driven by greed, a group of U.N. peacekeeping soldiers called "Keepers" devises a shocking scheme to get the world's attention after their tour of duty ends. Op-Center head Paul Hood has to put retirement on hold because the Keepers have taken over the U.N., where his daughter is performing for ambassadors at a gala function. This time the Keepers have made it personal, and the Op-Center forces will strike with deadly vengeance.