Star Tribune: Highly radioactive waste will likely accumulate in Minnesota for decades longer than expected because of a new energy policy taking shape in Washington. President Obama is closing the door on Yucca Mountain, a remote site in Nevada that for more than 20 years has been the nation’s only candidate for permanent burial of nuclear waste. That leaves the waste containers collecting at nuclear plants near Monticello and in Red Wing, with nowhere to go. “President Obama has …