Congo River and "Congo" is the preferred English name in 19th-century literature, although references to "Zahir" or "Zaire" as the name used by the inhabitants remained common. The Democratic Republic of the Congo and the Republic of the Congo are named after it, as was the previous Republic of the Congo which had gained independence in 1960 from the Belgian Congo. The Republic of Zaire during 1971–1997 was also named after the river, after its name in French and Portuguese. The Congo's drainage basin covers , an area larger than India. The Congo's discharge at its mouth ranges from , with an
27th Tactical Air Support Squadron The 27th Air Refueling Squadron was activated at Bergstrom Air Force Base, Texas, in October 1953 and assigned to the 27th Strategic Fighter Wing. The mission of the unit was to provide global refueling for the Strategic Air Command (SAC) 27th and 12th Strategic Fighter Wings at Bergstrom and other USAF units as directed. The unit was inactivated in 1957 shortly after SAC transferred its fighters to Tactical Air Command and a SAC refueling unit was no longer required to support them. The 27th Tactical Air Support Squadron was activated at Davis-Monthan Air Force Base, Arizona in July 1977, but