One moment, please <a href=" http://levitracheaper20mg.org/ ">order levitra cheap </a> Of course as Hurricane Sandy demonstrated last year, "We'llnever be able to eliminate (blackouts) entirely," said Jay Apt,a former NASA astronaut and physicist and director of theCarnegie Mellon Electricity Industry Center. "The frequency oflarge and small blackouts has not really changed since we becamegood at keeping statistics on them 30 years ago."