11.   In the history of medicine the only things that have really worked to stop diseases in the third world have been vaccines.

12.   Inside, hours passed before company workers discovered the spill and began working to stop it.

13.   Over the next few years, we analyzed why women were leaving and worked to stop the outflow.

14.   Palestinian leader Yasser Arafat condemned the suicide bombings and says his forces are working to stop them but many Israelis are skeptical of such claims.

15.   She sold hundreds of cameo pins to raise money for a Springfield group working to stop violence against women.

16.   Synagis is a genetically engineered antibody that works to stop the virus from fusing with and infecting the cells of the respiratory tract.

17.   The meeting will come just months before the White House begins the annual process of certifying that countries are working to stop the trade in illicit narcotics.

18.   The money goes to local and international groups working to stop domestic violence, rape, female genital mutilation, sexual slavery and incest.

19.   To stop working.

20.   When the squad got there emergency personnel helped him strip off his shirt and Kevlar vest, and worked to stop the bleeding in his chest.