The meetings in Alaska are a new test in increasingly troubled relations between the two countries, at odds over human rights, Chinese assertiveness and the coronavirus pandemic.
Gorbachev, who is widely credited with ending the Cold War, was very popular in the West, but a much more polarising figure within Russia.
"We will not accept that the United Kingdom will be the only country in the world that does not recognise the Delegation of the European Union as the equivalent of a diplomatic mission," High Representative Josep Borrell warned on Monday.
Official: Large car bomb kills 9 in Afghan capital
Stephen Ellison jumped into a stream to rescue a woman after she fell into the water in a village on the outskirts of Chongqing.
The German foreign minister called for a reversal of deteriorating relations with its strongest ally after four years of the Trump administration.
It came as Donald Trump used the virtual UN meeting to attack China over the emergence of coronavirus. China hit back at what it called "a political virus" and said Trump's accusations were "baseless".
The peace talks could see the exit of American and NATO troops from Afghanistan after 19 years of conflict.
The officer was a lieutenant-colonel stationed with NATO in Italy.