How did the haymarket riot of 1886 affect unions such as the knights of labor?

On May 4, 1886, a labor protest rally near Chicago's Haymarket Square turned into ariot after someone threw a bomb at police. ... The Haymarket Riot was viewed a setback for the organized labor movement in America, which was fighting for such rights as the eight-hour workday.

Egypt and Sudan. It's a long river, roughly about 4,000 miles.