Thank you, Mr. Chair.
Professor, it's great to have you here, particularly in light of your centre's study and the assessment of the risk factor.
In your study you talked about the plausibility of a technically sophisticated group being able to make, deliver, and detonate a nuclear bomb if it had the right materials. I come from Hamilton. We have McMaster University with its own reactor. Are those reactors, in your view—I'm sure you have them in the U.S. as well—sufficiently safe, and are the materials in them weapons grade?