Answer:
The historical event that opened the door for many women who worked at the Langley Laboratory was World War II
Explanation:
Langley Laboratory was the creator of many inventions that turned to be quite functional in war and got the attention of the government of the United States of America as they got involved in World War II, they did not only give this laboratory and impulse in their researches but also to the women that made them through the application of the Presidential mandate to end segregation in the defense industry
