Body cameras have proliferated in law enforcement agencies in the U.S. over the past decade, amid mounting scrutiny over how officers and agents interact with the communities they serve. The Associated Press on Thursday sat in on a discussion of the law-enforcement tool with representatives from more than 200 agencies nationwide, hosted by the think tank Police Executive Research Forum. New York City became one of the first large departments to adopt body cameras in 2013 after a federal court found police wrongly targeted minorities with a stop-and-frisk program, and many more joined amid th...