MONDAY, AUGUST 19 CHICAGO, ILLINOIS: US Democrats open their party’s national convention in Chicago, which will formalize Kamala Harris as the Democratic candidate in the presidential election in November. WORLD: This year’s first of four “supermoons” – when the moon is both full and closer than usual to Earth – rises in the night sky. SEOUL: The US and South Korea kick off their annual large-scale joint military exercise. SOPRON, HUNGARY: German President Frank-Walter Steinmeier visits the border town to mark the 35th anniversary of the Pan-European Picnic during the Cold War. VARIOUS DATELIN…