Temp labor is one of the fastest growing industries in the US. Increasingly, temp workers are part of a business strategy to keep costs down and profits high. From mega-retailers to mom-and-pop shops, temps are hired to do some of the hardest and most dangerous jobs. While more and more of the American workforce is comprised of temporary workers, they're largely hidden from public view. Many of these workers stay silent, often having their livelihoods threatened if they speak out.