"We've gotten a long way on missile defense. We know how to do it. We know how to take down incoming warheads, but we need to do a lot more work in order to be - to deploy a system that'll defend the United States against those kinds of limited strikes that might be possible by a nuclear armed North Korea or Iran"

This quote by Dick Cheney is referring to the need for the United States to more develop its missile defense system. He is highlighting the value of being able to resist minimal strikes from nations such as North Korea and Iran, who are both nuclear-armed. He acknowledges that the United States has made development in developing the system, but that there is still a lot of work to be done in order to deploy a system that will successfully secure the US from these type of attacks. This quote highlights the importance of the US continuing to purchase its rocket defense system in order to ensure the security of its citizens.