The immense nuclear-powered US aircraft carrier Carl Vinson has powered into Vietnamese waters, the first such visit since the end of the Vietnam War. The BBC's South East Asia correspondent Jonathan Head looks at how the rise of China lies behind this.
The influence of the United States in Asia is much diminished these days, but it still has one spectacular card it can play.
That comes in the form of the deployment of a carrier strike group, a naval flotilla centred on one of 11 giant "super-carriers", floating nuclear-powered air bases more than 300m long, carrying enough air power to flatten a small city.
The presence of a US carrier group can send a message of deterrence, as in the case of North Korea, or of support. The USS Carl Vinson's arrival in Danang this week is a visible gesture of commitment by Washington to the country with which it fought a terrible war just two generations ago.
This post has received a 2.57 % upvote from @speedvoter thanks to: @muktichugh.
I have transferred 0.2 SBD and you have given me a upvote of the same amount. thats not fair