I am not doubting or any fin but this what I saw:
Required Documentation
At your interview you must bring the following;
Selectee notification letter which you received from KCC.
Passport(s) valid for six months beyond the intended date of entry into the U.S. for you and each family member applying for a visa.
Original documents or certified copies of all applicable civil documents listed in the Step 3 instructions.
Yes bro the notification letter is in 2 parts,the first one from may and the interview letter and all is needed for the interview.