SHANKSVILLE, PA (AP).- The National Park Service on Monday released new architectural drawings of the first phase of the Flight 93 memorial, which is to be dedicated in time for the 10th anniversary of the Sept. 11 attacks this fall. One rendering shows a pair of white marble walls framing a ceremonial gateway that provides an entrance to a walkway tracing the path the airplane followed before crashing into the rural field. The other shows a separate memorial gateway — an open-air, concrete structure. A smaller glass enclosure will help provide shelter during bad weather. Only relatives of the 40 passengers and crew who died will be allowed to enter the actual crash site, but the public will be able to view it. There will be 40 vertical marble slabs along one side of the flight path walkway, each with a name of one of the victims on it. The Families of Flight 93 say about $50 million in public and private money has been