Athens detected the flame, the signal was sent to Ottawa via satellite where it was received and used to trigger a laser beam to re-light the flame. The torch, but not the flame, was taken into space by astronauts in 1996, 2000 and 2013. Other unique means of transportation include a Native American canoe, a camel, and Concorde. The torch has been carried across water; the 1968 Grenoble Winter Games was carried across the port of Marseilles by a diver holding it aloft above the water. In 2000, an underwater flare was used by a diver across the Great Barrier Reef en route to the Sydney Games. In 2012 it was carried by boat across Bristol Harbour in the UK and on the front of a London Underground train to Wimbledon. In 2004, the first global torch relay was undertaken, a journey that lasted 78 days. The Olympic flame covered a distance of more than 78,000 km in the hands of some 11,300 torchbearers, travelling to Africa and South America for the first time, visiting all previous Olympic cities, and finally returning to Athens for the 2004 Summer Olympics. The 2008 Summer Olympics torch relay spanned all six inhabited continents before proceeding through China. However there was protests against China's human rights record in London where a "ring of steel" was formed around the flame to protect it, but one protester managed to grab hold of the torch while it was being held by television presenter Konnie Huq. In Paris the torch was extinguished at least twice by Chinese officials (five times according to French police) so that it could be transported in a bus amid protests while it was being paraded through Paris. This eventually led to the cancellation of the relay's last leg in the city. Demonstrations were also held in San Francisco and the route the torch would take was cut in half. As a result in 2009, the International Olympic Committee announced that future torch relays could be held only within the country hosting the Olympics after the initial Greek leg was finished. Although this rule took effect with the 2014 Winter Olympics, the organizers of the 2010 Winter Olympics in Vancouver and the 2012 Summer Olympics in London chose to hold their torch relays only in their respective hosting countries of Canada and the United Kingdom (except for brief stops in the United States and