September 27, 2013, 6am PDT
With 12,000 docking stations, Paris' expansive Velib system is the envy of cities across the world. But last year it lost 9,000 bikes to theft or vandalism. Its admirable ambition is threatening the functionality of the entire system.
July 5, 2013, 9am PDT
The streets of San Diego may be safe once again for nefarious chalking after a jury acquitted a local man accused of 13 counts of vandalism for scrawling anti-bank messages on sidewalks.
August 16, 2012, 6am PDT
Next time you suggest your child goes outside to play, you might want to make sure they're not packing chalk. Josh Harkinson looks at the nationwide crackdown on chalk art. It's not just adults being cited.
February 10, 2009, 11am PST
Theft and vandalism have crippled the citywide bike rental system in Paris, leaving operator JCDecaux uncertain of the increasingly expensive program's future.
September 2, 2008, 5am PDT
In Prague, where graffiti is rampant, an art gallery has secured outdoor wallspace throughout the city and invited graffiti artists to use it as a canvas for 12 days.