Answer: true
Explanation: I think that what your question is but i am not sure
The egyptians use the two tone.the had two pipes of unequal length
A Special Interest Group (SIG) -a term which was first introduced in 1961 by the Association for Computing Machinery- is a community that belongs to a bigger organized body. Its primary purpose is to progress in a particular section of knowledge, education or technology where members collaborate to create solutions inside their specific field. Also, they might produce reports, meet, and arrange conferences.
The African-American unit you are describing are known as the Tuskegee Airmen .
This group of African-American pilots were critical in the success of the United States during World War II. Over the course of the war, these men completed thousands of missions. These men were extremely successful, as they performed 200 escort missions and never lost a bomber in the process.
