No one nation can deal with all the crises of our time, from terrorism, to nuclear proliferation, mass migration, cybersecurity, climate change, as well as experiencing, what we're experiencing now with pandemics. There's no wall high enough to keep any virus out. And our own vaccine supply, as it grows to meet our needs, and we're meeting them, will become an arsenal for vaccines for other countries, just as America was the arsenal of democracy for the world and, in consequence, influenced the world.