Effort to replace dead and unhealthy trees at Flight 93 memorial expected to take decades
Officials say it'll take decades to replace and revitalize trees at the national memorial in western Pennsylvania to the crew and passengers who died there when a hijacked airplane crashed on Sept. 11, 2001
Officials say it'll take decades to replace and revitalize trees at the national memorial in western Pennsylvania to the crew and passengers who died there when a hijacked airplane crashed on Sept. 11, 2001
