Context: The Aeronautics Branch was renamed the Bureau of Air Commerce in 1934 to reflect its enhanced status within the Department. As commercial flying increased, the Bureau encouraged a group of airlines to establish the first three centers for providing air traffic control (ATC) along the airways. In 1936, the Bureau itself took over the centers and began to expand the ATC system. The pioneer air traffic controllers used maps, blackboards, and mental calculations to ensure the safe separation of aircraft traveling along designated routes between cities.

Question: What was the Areonautics Branch renamed to?
Answer: Bureau of Air Commerce

Question: When was the Aeronautics Branch renamed?
Answer: 1934

Question: When did the Buerau take over and begin to expant the ATC system?
Answer: 1936

Question: What were the people who used maps, blackboards, and mental calculation to ensure the safe separation of aircraft traveling between cities called?
Answer: air traffic controllers

Question: What was the Bureau of Air Commerce renamed to?
Answer: Unanswerable

Question: When did the bureau create the first air traffic control centers?
Answer: Unanswerable

Question: When was the Aeronautics branch renamed to reflect it's decreased status?
Answer: Unanswerable

Question: What did the bureau used to ensure the safe travels of aircraft?
Answer: Unanswerable

Question: As personal flying increased, what did the Bureau establish?
Answer: Unanswerable