"On June 21, civil rights workers Michael Schwerner, Andrew Goodman, and James Chaney disappeared in Neshoba County, Mississippi, where they were volunteering in the registration of African-American voters as part of the Mississippi Summer Project.The disappearance of the three activists captured national attention and the ensuing outrage was used by Johnson and civil rights activists to build a coalition of northern and western Democrats and Republicans and push Congress to pass the Civil Rights Act of 1964.