Two helicopters (Aerospatiale AS355F1 Twin Squirrels) were active during the morning: one in a high(~2000 ft?) hover over the CBD (like the British AAC Gazelles used to do over Belfast in the 80s) and the other seeming to have a low level roving brief. Probably related to the visit that morning by German Chancellor Angela Merkel and the Canadian Prime Minister Stephen Harper
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