US warplane approaches Shanghai as tensions remain high amid consulate closures
sg.news.yahoo.com
sg.news.yahoo.com
It has several, yes, lots of downsides. Nothing like WWW3 (that's so XXs), but China will probably take the chance to hit hard, taking a long time toll from the US infrastructure, if not in US mainland (highly unlikely if they don't want to have theirs bombed), probably overseas.
They'll clear their way in, into several markets / territories, currently out of reach because US fully control them (South Korea, Japan, Vietnam, Taiwan, but some African countries could easily be added to the list).
War is not really a good idea for US.
Flying warplanes near another country's border... US is so much more aggressive than I knew...