John McCain: “Do you believe we should be supplying the Ukrainians with lethal defensive weapons, yes or no?”

The United States faces a new strategic reality in Europe. The first step in addressing it is to recognize the scope, scale, and seriousness of the challenges Russia presents to our national security and to the international order.

Are you concerned about the affordability and executability of the Department's plan for Block 4 Continuous Capability Development and Delivery (C2D2)?

The Department of Energy's defense atomic energy programs are critically important to our national security.

Major General Robinson, what more is needed from Congress, in terms of authorities or otherwise?