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Continue to ChatSafety is always number one. it is the foundation of everything that the department does, there are a lot of questions about these systems. What type of propulsion will be used ? Where, how far and how fast will they fly ? Will they be manned, remotely controlled or self-piloted ? - Elaine Chao from https://whatsmyquote.com/quote/safety-is-always-number-one-it-is-the-foundation-of-everything-that-the-department-does-there-are-a-lot-of