In early August 1963, major political and technological events unfolded: on August 2, China sharply condemned the Soviet Union for agreeing to a partial nuclear test ban treaty, widening the Sino-Soviet split. A day later, on August 3, NASA's Syncom 2 became the first spacecraft to achieve geosynchronous orbit, successfully hovering 22,500 miles above Brazil. That same day, The Beatles played their final show at Liverpool's Cavern Club, after recording a duet for BBC radio earlier in the month. On August 4, 500 Haitian rebels invaded from the Dominican Republic in a failed attempt to overthrow President "Papa Doc" Duvalier. The month also saw the Hague Protocol on international air travel take effect, the tragic suicides of Profumo affair figure Stephen Ward and Washington Post publisher Phil Graham, and the births of future stars Coolio and James Hetfield.