Here's video (4:08) of the 1959 Kitchen Debate:
Here's a video (14:22) of President Nixon announcing the 1970 incursion into Cambodia.
In this clip (3:33), President Nixon announces his 1971 trip to China.
This clip (2:33) assesses the impact of that visit.
This clip (2:38) discusses withdrawal of U.S. troops from Vietnam.