The iconic Arecibo observatory has suffered a second cable break and now the engineers who were trying to reinforce the structure think that it’s no longer safe to try and save the structure. The National Science Foundation which has been funding the installation for decades have decided to authorize demolition of the historic structure to avoid damage to other parts of the facility.
http://www.naic.edu/~phil/hardware/telescope/auxmain200810/NSF-arecibo-engineering_report.pdf
