We were just outside the "secure zone" for the G20 when we felt the rumbling and shaking. Two large U.S. military/governmental helicopters (they said "United St

We were just outside the "secure zone" for the G20 when we felt the rumbling and shaking. Two large U.S. military/governmental helicopters (they said "United States of America" on the side) were taking off from just beside the CN Tower. Man those Americans have powerful helicopters we thought.