Updated: March 2, 2014 at 7:18 pm
HILL AIR FORCE BASE, Utah (AP) — The Hill Aerospace Museum at Utah's Hill Air Force Base is downsizing.
Museum officials say they'll reduce their collection by 18 aircraft, three missiles and an unspecified number of support vehicles.
Acting Museum Director Aaron Clark says the museum no longer has the manpower and funding necessary to give the aircraft the care they need.
He says planes on display outside need to be painted every five years or so, which can run from $15,000 to $100,000, depending on the size of the aircraft.
Plans call for the 18 planes to first be offered to other museums across the country.
Clark says after the downsizing, the museum will still feature more than 2,000 artifacts, including over 50 planes.
More than 138,000 people visited the museum last year.