Above: The Pop-up Pools project in Philadelphia was a 2015 Knight Cities Challenge winner. Photo Courtesy The Pop-Up Pool Project. We opened the second round of the Knight Cities Challenge in October with a little trepidation. We had been impressed by the enthusiasm for the first round of the challenge, which attracted more than 7,000 applications. We wondered if there … Continue reading 37 Knight Cities Challenge winners will share $5 million in funding