National Public Radio: GUY RAZ, host: This is ALL THINGS CONSIDERED from NPR News. I’m Guy Raz. It’s now being estimated that every eight days, a spill the size of the Exxon Valdez is leaking into the Gulf of Mexico. If that’s accurate, the Gulf oil spill so far is seven times larger than that spill, and it’s still flowing. President Obama will take a two-day trip to visit the Gulf Coast starting Monday. And on Tuesday night, he’ll address the nation from the Oval Office. Meantime, the …