Key lawmakers and regulators this week will dig into unfolding details surrounding the nuclear emergency Japan declared in the wake of a massive 8.9 magnitude earthquake and tsunami and how U.S. officials are safeguarding the domestic nuclear fleet. Rep. Fred Upton (R-Mich.), chairman of the House Energy and Commerce Committee and a proponent of nuclear power, said he will use a Wednesday hearing to question the head of the Nuclear Regulatory Commission about the Fukushima Daiichi nuclear power plant, as well as domestic operations. Go to story #1