October 1 1979 / fromthearchive / Globe Staff Photo By David L. Ryan / Cardinal Humberto S. Mederios and First Lady Rosalyn Carter greet Pope John Paul II on his arrival at Logan Airport. The Cardinal and Mrs. Carter entered the plane, greeted the Pontiff inside and then followed him down the ramp and along a red carpet receiving line. When the Pope stepped from the green and white Aer Lingus 747 jetliner, named