The code talkers work contributed mostly to

The code talkers work contributed was mostly associated with the bilingual Navajo speakers who were recruited during the 2nd World War by the United States Marine Corps to serve in the standard communications units of the Pacific theater to combat units overseas. The Cherokee and Choctaw peoples pioneered code talking during World War I, And in World War II the Code Talkers communicated messages through radio and telephone in their native language, a code that the Japanese were unable to break.

worldwide, 780 million people do not have access to an improved water source. an estimated 2.5 billion people lack access to improved sanitation (more than 35% of the world's population)

interest groups send representatives to state capitals and to washington, d.c. to put pressure on members of congress and other policymakers. they engage in lobbying, or the organized process of influencing legislation or policy. lobbying can take many forms. interest groups can testify in congressional hearings.