Obama is the new kid with the weird name who people just sense is a little classier than his surroundings. He moved from a private school where he was class president and is now at the giant public high school with the metal detectors and the smoking lounge.

The technical challenges were technical challenges that were not unbeatable; it was just that we had to learn how to do things and how to build a sensitive enough device. That took us 20 years after we built the first version of the LIGO detector.

After every massacre in a school, Americans grasp at quick cures. 'Let's install metal detectors and give guns to teachers' Let's crack down on troublemakers, weeding out kids who fit the profile of a gunman. Let's buy bulletproof whiteboards for the students to scurry behind, or train kids to throw erasers or cans of soup at an attacker.'

Lie detectors sometimes work because people believe they work, deterring the wrong people from applying for jobs in the first place, or prompting admissions of guilt during interrogations.

If you write a letter of resignation or something with an agenda, you're simply using a pen to record what you have thought out. In a poem, the pen is more like a flashlight, a Geiger counter, or one of those metal detectors that people walk around beaches with.

On Etsy, you can't resell new goods you weren't involved in making, whereas on eBay and Amazon, that is more than welcome - everything from dishwashers to XBoxes, curling irons, espresso machines, and metal detectors.