USAF Retires "First Operational" KC-135R....Again

USAF Retires "First Operational" KC-135R....Again:
The U.S. Air Force announced on Feb. 22 that it had retired the "first operational KC-135R" from service, when tail number 61-0312 arrived at Davis-Monthan AFB, AZ. However, Aviation Week Intelligence Network's Fleet database records KC-135R tail number 60-0319 arriving for storage on Jun. 20, 2012. It's unclear therefore why the folks at Altus proclaimed this month's arrival as the "first".
In the 1980s and 1990s the USAF re-engined over 400 tankers with more powerful and efficient CFM-56 engines, designated KC-135R or KC-135T. These are now the only KC-135s in the fleet and are expected to soldier on for many years yet.