How did the tuskegee airmen change public perceptions of black servicemen

They did represent an important step forward in preparing the nation for the racial integration of the military, which began with President Harry Truman and his executive order of 1948 mandating equality of opportunity and treatment within the U.S. armed forces.

the causes of the dust bowls were severe droughts,   lands became dry and hard, temperature was higher than usual, hot and dry conditions killed crops, high winds. because of those factors, the winds kicked up dry soil and created clouds of dust.

this is a good question! i'll do some research and come back when i have the answer!