November 7, 2012, 5am PST
As America's cities grow and expand, there's great opportunities--but there are also significant challenges. Twenty innovative metros are vying for $9 in grant money to address their city's greatest needs.
June 13, 2012, 1pm PDT
Launched today by Bloomberg Philanthropies, the Mayors Challenge will award $9 million in prizes as a down payment on urban innovation, reports Ariel Schwartz.