ABC's RICK KLEIN: The Benghazi story entered a new phase this week, one that's destined to keep the investigation and the accusations alive for a while longer — maybe a long while. Questioning on Wednesday, and new revelations about the editing of the now-infamous talking points, put scrutiny on Hillary Rodham Clinton's leadership at the State Department. American Crossroads and America Rising, two GOP-aligned SuperPACs, have new Web videos putting spotlights on Clinton, not President Obama. Republicans now see Benghazi as way to get at the 2016 frontrunner, someone with a history of being targeted by political enemies. Clinton's defiant testimony in January — "what difference at this point does it make?" — rather clearly won't be the last word now.