Where should we draw the line between civil liberties and national security in the 'war on terror'? with Richard Epstein and John Yoo. This program is part of the Hoover Institution's interview series, Uncommon Knowledge.Are we even at war, and if so, what are the constitutional limits to presidential war powers? Has the Bush administration gone too far in the electronic surveillance of citizens and the coercive interrogation of suspected terrorists and enemy combatants? Richard Epstein and John Yoo, both widely regarded as strict constitutional constructionists, take decidedly different positions on these questions.