CARACAS, Venezuela (AP) - President Hugo Chavez offered to share Venezuela's U.S.-made F-16 fighters with Cuba and China on Tuesday, accusing Washington of breaching a supply contract for jet parts and calling it the sort of U.S. "imperialism" he will challenge at an upcoming Summit of the Americas. Chavez said he would take the message that Washington's "capitalist, imperialist model" was responsible for exploiting developing economies and ruining the global environment to this week's summit in Argentina, also to be attended by U.S. President George W. Bush. "We don't need American imperialism to live," Chavez said at a ceremony announcing...