LOS ANGELES (Reuters): Local TV stations are plugging one of the last major holes in mobile video: streaming their news to phones and tablets. The move presents yet another challenge to cable and satellite providers, which are grappling with the widespread online availability of content. This fall, 112 U.S. stations will begin streaming live newscasts through an app called NewsOn, one of several planned “over-the-top” offerings delivered online without a pay TV subscription. And Verizon Digital Media Services, which offers technology that enables streaming on a wide variety of screens, is in talks with owners of more than 300 affiliates that want to supply programming directly to consumers over the Internet, Ralf Jacob, chief revenue officer, told Reuters.