Coldplay kicks off stadium tour with colorful show

Coldplay kicked off its U.S. stadium tour with a colorful show that included fireworks, confetti and balloons, mixed with American pride, sympathy for France, moving words from Muhammad Ali and audio from President Barack Obama.

The British foursome led by Chris Martin performed for feverish fans Saturday at the MetLife Stadium in East Rutherford, New Jersey. They started their two-hour show on a bright, high note — jamming onstage as fireworks burst to the sky — matching the glowing, multicolored wristbands fans received walking into the venue.

Martin worked the stage playfully throughout the night: He ran up the long aisle enthusiastically, rolled on the...