What is the significance of 14 CFR 91.161(a) in relation to the DC SFRA? A. Pilots must complete Special Awareness Training to fly within a 60 NM radius of the DCA VOR/DME under VFR. B. All flights are prohibited within a 60 NM radius of the DCA VOR/DME. C. Only IFR flights are allowed within a 60 NM radius of the DCA VOR/DME