Leon Panetta: “I really think everybody needs to take a deep breath and allow this investigation to proceed.”

And ... we’re going to have to respond. And right now, because our missile systems and our supply of weapons being down, this is a vulnerable period for the United States.

I think the United States ought to be part and parcel of any agreement to be able to provide a security assurance to make sure that Ukraine is protected from the kind of invasion that we've seen from Russia.

It is inexcusable not to do the proper planning that has to be done in order to make sure that their deployment is not overextended, that they’re getting the supplies they need, that they’re getting the support they need.

Something, somebody, somewhere failed to do the proper planning for what had to take place in order to properly support our men and women in uniform.