http://www.nbcphiladelphia.com/news/national-international/Razor-Blades-Found-Glued-to-Illinois-Playground--252342031.html
http://www.nbcphiladelphia.com/news/local/Razor-Blades-Found-on-Playground-Equipment-253481511.html
http://www.nj.com/south/index.ssf/2014/04/razor_blades_glued_to_playground_equipment_again_--_this_time_outside_philadelphia.html