 Following the 2011 Japanese nuclear accidents, the U.S. Nuclear Regulatory Commission has announced it will launch a comprehensive safety review of the 104 nuclear power reactors across the United States, at the request of President Obama.A total of 45 groups and individuals had formally asked the NRC to suspend all licensing and other activities at 21 proposed nuclear reactor projects in 15 states until the NRC had completed a thorough post-Fukushima reactor crisis examination.The petitioners also asked the NRC to supplement its own investigation by establishing an independent commission comparable to that set up in the wake of the serious, though less severe, 1979 Three Mile Island accident.