SFRA, Stall Speed, and Stability

What is a SFRA? Special Flight Rules Area? Especially around Washington DC. I recommend every applicant takes the course that is required to operate within 60nm of Washington DC on FAASafety.gov.
It's also important to know what factors affect stall speed, understand how CG location affects stability and be prepared to convey them in a way that you have a clear understanding and not just memorization.