Daniel Ellsberg, author, former US military analyst, and one of the most prominent political whistleblowers in US history, will headline Constitution Day. The panel, moderated by WYPR’s The Signal producer and MICA faculty member Aaron Henkin, will also include Kade Crockford, director of the Technology for Liberty project at the ACLU of Massachusetts, and interdisciplinary artist Hasan Elahi, whose work has explored the implications and consequences of surveillance for more than a decade.