Beginning this weekend, aircraft buffs will be able to stroll up to and touch about half dozen historic aircraft at the city's newest public facility, the Heritage Airpark. The airpark, at 25th Street East and Avenue P, is a memorial to the aircraft designed, built and tested at U.S. Air Force Plant 42 since the facility was established in 1951. The airpark is open from 11 a.m. to 3 p.m. Saturdays and Sundays beginning Jan. 17. A formal ceremony marking the opening of the facility will be held in March, noted Mayor Jim Ledford. Meanwhile, volunteers will continue to prepare...