Link round-up

As the work week slowly grinds down, I've lined these articles up for consumption tomorrow morning:

• Paul Krugman has thoughts about Fitbits.
• Chicago is going ahead with a $1bn plan to finish the O'Hare Modernization Project.
• Elsewhere in our fair city, a Meetup group walks the entire length of a Chicago street once a month. I might join.
• Monkeys can't own copyrights in the U.S., even for their own selfies.

And now it's off to the barber shop. And then the pub.