The question of whether Uzbekistan should join the Russia-led Eurasian Economic Union, with its single market of 184 million people, has provoked fierce debates.
The announced deals could be significant, and come shortly after the two sides patched up a period of serious political tensions. But many details remain unclear.
The two adversaries have been choosing not to use one another’s air space. Now Armenians are asking why their government is allowing Azerbaijani overflights.