The head of the Nuclear Regulatory Commission was set to get a firsthand look today at the troubled San Onofre nuclear reactor near San Clemente, where the twin reactors have been sidelined for more than two months. The tour by NRC chair Gregory Jaczko comes 10 days after the agency announced San Onofre will remain offline until Southern California Edison fixes a widespread problem with tubing that carries radioactive water. Senator Diane Feinstein and Republican Congressman Darrell Issa were scheduled to join the walk-through. Katie Styer reports.