Art installations make New York's subway stations galleries on the go

NEW YORK -- Deep below the frenzied streets of New York City are the gritty subway tunnels and platforms packed with people. Roaring trains and a sea of humanity meld with grey concrete surroundings. You're rushing along when a kaleidoscope of color jolts your eye. A scene crystallizes.Over the past 30 years, 300 artworks have been commissioned by the Metropolitan Transportation Authority and installed across the five boroughs and commuter rail stations. They're site specific and integrated into...