Of all the lessons we can learn from the BP fiasco, the simplest, and the first we should apply to offshore-drilling laws, is this: Don't open any holes you can't close. If the well site is too deep for humans to reach, drill a simultaneous relief well so you can plug a blowout promptly. If a relief well is too expensive, don't drill at all. Or you can keep robots on hand to shut down leaks. But they'll have to be better robots than the ones we're now watching.Today's laws don't come anywhere near this standard.