U.S. officials believe Cuba has a "limited" biological warfare research and development program, according to John Bolton, under secretary of state for arms control and international security. Moreover, Cuba has been the source of dual-use biotechnology for a number of rogue states, he said. "We are concerned that such technology could support BW programs in those states," Bolton said yesterday at the Washington-based Heritage Foundation. "We call on Cuba to cease all BW-applicable cooperation with rogue states and to fully...