Jack Dorsey Chairman after Dick Costolo replaced Williams as the CEO. On June 10, 2015, Costolo announced that he was resigning as CEO of Twitter, effective July 1, 2015. Dorsey would assume the post of Interim CEO upon Costolo's departure. He was named permanent CEO of Twitter on October 5, 2015. On the day after the controversy about Twitter's new algorithms for tweets, Dorsey responded to the trend, saying it was only a hoax. In May 2016, Dorsey announced that Twitter would not count photos and links in the 140-character limit to free up more space for text. This move was an
Terrorism and social media to Prevent Terrorism and Preserve Innovation." At the hearing, members heard testimony from William McCants, an analyst for the Center for Naval Analyses, Aaron Weisburd, director of the Society for Internet Research, Brian Jenkins, senior advisor for the Rand Corporation and Evan Kohlmann, senior partner from Flashpoint Global Partners. McCants stated that while terror groups were actively using social media platforms to further their goals, research did not support the notion that the social media strategies they adopted were proving effective: We are talking about a relatively small number of people. Because the number of people is so small, it