11.   Authorities say rebels involved in drug trafficking are retaliating against a U.S.-backed government program to wipe out fields of coca, the plant used to make cocaine.

12.   Authorities say the attacks are in retaliation for government efforts to wipe out coca, the plant used to make cocaine.

13.   Bolivia brushed aside threats of strikes and blockades by coca leaf producers and pledged Monday to continue destroying the plantations used to make cocaine.

14.   But the government said fumigation of larger fields of the plant used to make cocaine will continue.

15.   Caqueta also was the site of riots earlier this year by coca farmers protesting government plans to destroy their crops, which are used to make cocaine.

16.   Coca growers have blocked highways with rocks to protest a decree banning the commercialization of coca, a traditional Andean plant used to make cocaine.

17.   Coca is the raw material used to make cocaine.

18.   Coca is used to make cocaine.

19.   Coca leaf is used to make cocaine.

20.   Coca is the plant used to make cocaine.