U.S. troops keep watch at the site of a suicide attack on the outskirts of Jalalabad, January 2015.
Parwiz / REUTERS

We at Foreign Affairs have recently published a number of pieces dealing with U.S. counterterrorism policy. To complement these articles, we decided to ask a broad pool of experts for their take. As with previous surveys, we approached dozens of authorities with deep specialized expertise relevant to the question at hand, together with a few leading generalists in the field. Participants were asked to state whether they agreed or disagreed with a proposition and to rate their confidence level in their opinion; the answers from those who responded are below: