What letter must appear at the beginning of the registration number of all non-military aircraft in the U.S.?
Ⓝ 🅽 ⒩ 🄽 ⓝ N (letter) Ｎ 🄝 N 🅝 En (letter)
🅝 ⒩ en letter ⓝ n 🅽 n letter 🄽 ｎ 🄝
n
WikipediaEntity
N