WASHINGTON (AP).- A 715-year old copy of Magna Carta will soon return to public view at the National Archives after a conservation effort removed old patches and repaired weak spots in the English declaration of human rights that inspired the United States’ founding documents. The National Archives unveiled the medieval document Thursday in a specially humidified glass and metal case. It is the only original Magna Carta in the United States and will return to public display Feb. 17. A $13.5 million gift from philanthropist David Rubenstein funded the conservation, the custom-built case and a new gallery being renovated to host Magna Carta. Rubenstein bought the historic document at auction in 2007 for $21.3 million and sent it to the National Archives on a long-term