C & D Visa
They ran out of slots for the 10/30 oath about 7 people before me, so after that all of us got the N652 with "civics test/English passed" and "congratulations; it seems you are eligible...etc etc checked off, and when they handed it to to us they said our oath letters will be in the mail soon.
"C" Nonimmigrant Visas - Transit Visas
The "C" visa is intended for those individuals whose travel takes them through the U.S., without intending to actually enter the U.S.
The specific visa codes are: