Part of the architect’s vision for the memorial is that it will be a place of renewal. Reclaiming the land after decades of surface mining has left much of it in open grassland. Plant a Tree at Flight 93 is multi-year effort to reforest large portions of this land. For the 2013 effort, over 500 volunteers planted more than 15,500 tree seedlings over 23 acres. This gallery is a mix of images from all four days of the 2013 effort.