About 15 minutes or less, as the missiles were ICBM's (intercontinental ballistic missiles) and had/has massive power behind it's impact and launch, essentially devastating the targeted area within minutes from launch. Also is the main reason why the U.S. feared having the missiles in Cuba, and why they fear North Korea having the missiles. Remember to check yourself.
Hope this helps :)
Answer:
Improved relations with the Soviet Union and the PRC are often cited as the most successful diplomatic achievements of Nixon's presidency. ... The reason for opening up China was for the U.S. to gain more leverage over relations with the Soviet Union. Resolving the Vietnam War was a particularly important factor.
A they did not use their navy
