11.   Leftist rebels, based in the foothills climbing steeply into the Andes just west of Yopal, have operated in the area for decades.

12.   Leftist rebels, who have often bombed oil pipelines, have not been ruled out.

13.   Leftist rebels and their archenemies, the paramilitary groups, are more visible than before.

14.   Moving decisively toward ending the longest guerrilla conflict in the Western Hemisphere, the government and leftist rebels of Guatemala signed an ambitious peace accord here on Thursday.

15.   Nearby villages, some of which still support the leftist Zapatista rebels, have started asking Ochoa for help in setting up their own lodges.

16.   The beards, long hair, flamboyant clothes and foul language that used to be associated primarily with hippies and leftist rebels had gone mainstream.

17.   The Bush administration hopes to use concern over terrorism to build support in Congress for direct aid to the Colombian government to fight leftist rebels, officials say.

18.   The Bush administration plans to ask Congress to lift restrictions on U.S. military aid to Colombia to help the government in Bogota fight leftist rebels, officials said Thursday.

19.   The National Liberation Army, a smaller leftist rebel group known as the ELN, is fighting as well.

20.   The remote jungle area is infested with leftist rebels as well as right-wing paramilitary death squads.