What's happening in Ottawa this weekend: June 30 - July 3

Fireworks explode behind the Peace Tower on Parliament Hill during Canada Day celebrations, in Ottawa on Wed., July 1, 2015. (THE CANADIAN PRESS/Justin Tang) Fireworks explode behind the Peace Tower on Parliament Hill during Canada Day celebrations, in Ottawa on Wed., July 1, 2015. (THE CANADIAN PRESS/Justin Tang)

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Shift in war's front seen as grain leaves Ukraine, power plant hit

Four more ships carrying agricultural cargo held up by the war in Ukraine received authorization Sunday to leave the country's Black Sea coast as analysts warned that Russia was moving troops and equipment in the direction of the ports to stave off a Ukrainian counteroffensive.