Outside Shanksville, Pennsylvania, where Flight 93 went down into a rural country field that was once a coal strip mine, visitors from around the world continue to visit.  A grove of sweet gum trees, planted by locals, grace the site.  Now a national memorial site, the Park Service plans to add more landscaping.  At the time, the downed plane was flagged by remnants of its mining history – two huge mining cranes that were still on site.  Signs along the Pennsylvania Turnpike will steer the curious to the memorial even as plans for exhibits continue.  Current visitors can walk along a concrete path to a Wall of Names of the 40 victims.  In the works, depending upon funding, is a Tower of Voices at the entrance that will include 40 large windchimes.  The actual crash site will remain closed to the public.  There is no fee to enter the site; operating hours are Winter Hours: 9 am-5 pm (effective TBA – October, 2011) and Summer Hours: 9 am-7 pm (effective April 1, 2011).