http://www.msn.com/en-us/news/world/new-cuban-missile-crisis-looms-in-asia-china-media/ar-BBuBTrp?li=BBnb7Kztl;dr - USA wants to build a missile defense system in Seoul. China is saying it's fine if USA wants to protect from North Korea, but this is also a power play to show the USA's growing allies in Southeast Asia. Comparing this to the USA being around Cuba and upsetting the USSR in the early 60s.
I think this is where the USA messes up. Of course this is to protect from North Korea, but of course this is also a way to monitor China's offense. If China built a missile defense system in Mexico and said it was to protect themselves from Honduras, the USA would absolutely be pissed off that it's so close to the USA.
Meh, discuss.