The federal authorities initially joined the freedom ride to provide the riders with protection through the first freedom ride that happened in Washington, D.C. on May 4, 1961.
A freedom ride refers to number of political protests against the existence of segregation of Blacks in riding of buses together through the American South.
In conclusion, the federal authority joined through first freedom ride that happened in Washington, D.C. on May 4, 1961.
Read more about freedom ride
brainly.com/question/530864