* Purple and Brown Line service returning to normal after bridge work.
* Customer accused of attacking CTA driver taking bathroom break.
LONG ARM, BIG DATA. Increasingly cheap technology and easy access to social-network profiles stands to make police work easier and more productive. But that makes civil libertarians nervous.
* U. of C. law prof: “If we really care about rights, we should mandate DNA testing … of everyone.”
* ACLU: Drones make possible new forms of privacy-invasion.
* Twitter knows bushels about you before you even sign up.
DISARMING NEWS. The percentage of U.S. homes with guns is down over the last 40 years — in all regions of the country — according to a new national survey.
* NYC Mayor Michael Bloomberg says he aims to “level the playing field” against the National Rifle Association.
* Neil Steinberg on gun-rights advocates’ opposition to drones: “On the one hand: The government cannot be trusted to identify a person as being so much of a threat he should be killed. On the other: Any random citizen can.”
* President Nixon considered a ban on all handguns.
FUNNY THINGS YOU MAY HAVE MISSED OVER THE WEEKEND.
* The return of about everyone who’s ever hosted “Saturday Night Live.” (Or so it felt.)
* President Obama, his “joke writers … placed on furlough,” joking about Bob Woodward and Nate Silver.
* Silver revealing whom he’d like to see as himself in a movie.
2 QUESTIONS MOST OFTEN ANSWERED INCORRECTLY IN THIS BLOG’S LATEST NEWS QUIZ.
* The New York Times shuttered its blog about _____.
* Chicago’s murder total for February was _____.
Take the quiz now and improve those averages, won’t you?