See the full episode at http://video.pbs.org/video/2238342648Coming May 22: FRONTLINE and ProPublica investigate the hidden cost that comes with the demand for better and faster cell phone service. The smartphone revolution comes with a hidden cost. A joint investigation by FRONTLINE and ProPublica explores the hazardous work of independent contractors who are building and servicing America's expanding cellular infrastructure. While some tower climbers say they are under pressure to cut corners, layers of subcontracting make it difficult for safety inspectors to determine fault when a tower worker is killed or injured. Watch on air and online beginning May 22 at 10 pm ET on PBS (check local listings). http://to.pbs.org/K9ZJUH
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