It's vital to deal with the new threat environment.
The simple answer to this is old versus new. Canada has no choice for a variety of strategic reasons: interoperability and responding as we do to allied, U.S.-led initiatives. It is vital to deal with the more complicated threat environment that has emerged to North America in particular, from long-range cruise missiles to hypersonic vehicles, and I'll put ballistic missiles on the sideline here.
We simply will not be able to adapt, and we will not be able to be interoperable with our NORAD ally, the United States, in coordinating and providing an effective air or aerospace deterrent and, at the end of the day, defence capability. If we don't do this, then we'll be marginalized.