Apple's new iPad goes on sale this Friday, the latest version of a wildly popular product from an iconic company. In the past couple of months, though, Apple has come under criticism for working conditions in Chinese factories that help build iPads.
A New York Times investigation focused on an explosion at an Apple supplier factory last May. In December, another explosion struck a different Apple supplier factory in Shanghai.
Last week, NPR met with 25 workers injured in the Shanghai blast and they criticized safety at the plant and said Apple had inspected it just hours before the explosion.
