11.   But controlling the spread of the ingredients used in chemical and biological weapons is next to impossible, because many have legitimate uses as well as lethal ones.

12.   But President Vladimir Putin said Moscow backs any efforts to control the spread of terrorism to the Pankisi Gorge.

13.   Clinton recently expressed his support for such programs to control the spread of the AIDS virus but decided not to let federal funds be used for the programs.

14.   Despite those differences, the United States and Russia have agreed to continue cooperating to control the spread of missile technology.

15.   In policy terms, Walters opposes the idea of distributing syringes to drug addicts as a way of controlling the spread of HIV.

16.   It argued that controlling the spread of encryption software made it easier for the U.S. to thwart terrorist plots, and therefore it had a compelling national security interest.

17.   Japan says it does not want to take away existing beyond rights but does want to control the spread of new routes beyond Japan in the future.

18.   Later that day, large swathes of San Francisco were dynamited to make fire breaks and control the spread of the blaze.

19.   Many AIDS specialists now credit the sanitarium system with controlling the spread of the disease, which has made fewer inroads in Cuba than almost anywhere else.

20.   One of the biggest obstacles to controlling the spread of the AIDS virus among young blacks is denial.