A perfect 10 is a score of 10.000 for a single routine in artistic gymnastics, which was once thought to be unattainable—particularly at the Olympic Games—under the code of points set by the International Gymnastics Federation (FIG). It is generally recognized that the first person to score a perfect 10 at the Olympic Games was Romanian Nadia Comăneci, at the 1976 Games in Montreal. Other women who accomplished this feat at the Olympics include Nellie Kim, also in 1976, Mary Lou Retton in 1984, Daniela Silivaș and Yelena Shushunova in 1988, and Lavinia Miloșovici in 1992. The first man to score a perfect 10 is considered to be Alexander Dityatin, at the 1980 Olympics in Moscow. (However, in the 1924 Paris Olympics, 22 men achieved a mark of 10 in rope-climbing, with one Albert Séguin getti
A perfect 10 is a score of 10.000 for a single routine in artistic gymnastics, which was once thought to be unattainable—particularly at the Olympic Games—under the code of points set by the International Gymnastics Federation (FIG). It is generally recognized that the first person to score a perfect 10 at the Olympic Games was Romanian Nadia Comăneci, at the 1976 Games in Montreal. Other women who accomplished this feat at the Olympics include Nellie Kim, also in 1976, Mary Lou Retton in 1984, Daniela Silivaș and Yelena Shushunova in 1988, and Lavinia Miloșovici in 1992. The first man to score a perfect 10 is considered to be Alexander Dityatin, at the 1980 Olympics in Moscow. (However, in the 1924 Paris Olympics, 22 men achieved a mark of 10 in rope-climbing, with one Albert Séguin getting a second 10 in the sidehorse vault, events that are no longer part of artistic gymnastics.) The FIG changed its code of points in 2006. There are now different top scores, all greater than 10, for the various events, based upon difficulty and artistic merit; there is no consistent perfect score. Execution scores are still out of 10, so the theoretical possibility exists for a gymnast to get a "perfect 10" for execution in addition to whatever number they get for difficulty, but no such score has been awarded in decades.

RÉSO, commonly referred to as the Montreal Underground City or the Underground City of Montreal, the world's largest underground city, network and complex (French: La ville souterraine), is the name applied to a series of interconnected office towers, hotels, shopping centres, residential and commercial complexes, convention halls, universities and performing arts venues that form the heart of Montreal's central business district, colloquially referred to as Downtown Montreal. The name refers to the underground connections between the buildings that compose the network, in addition to the network's complete integration with the city's entirely underground rapid transit system, the Montreal Metro. Moreover, the first iteration of the Underground City was developed out of the open pit at the southern entrance to the Mount Royal Tunnel, where Place Ville Marie and Central Station stand today. Though most of the connecting tunnels pass underground, many of the key passageways and principal access points are located at ground level, and there is also one skybridge (between Lucien-L'Allier Metro station and Gare Lucien L'Allier). In this regard, the Underground City is more of an indoor city (ville intérieure) than a truly subterranean city, although there are vast commercial sectors located entirely underground. The network is particularly useful during Montreal's long winters, during which time well over half a million people are estimated to use it every day. The network is largely climate controlled and well-lit, and is arranged in a U-shape with two principal north–south axes connected by an east–west axis. Combined, there are 32 kilometres (20 mi) of tunnels over 12 square kilometres (4.6 sq mi) of the most densely populated part of Montreal. In total, there are more than 120 exterior access points to the network, not including the sixty or so Metro station entrances located outside the official limits of the RÉSO, some of which have their own smaller tunnel networks. Some of the city's larger institutions, namely McGill University, the Montreal Museum of Fine Arts, Concordia University and the Université de Montréal, also have campus tunnel networks separate from the Underground City.
RÉSO, commonly referred to as the Montreal Underground City or the Underground City of Montreal, the world's largest underground city, network and complex (French: La ville souterraine), is the name applied to a series of interconnected office towers, hotels, shopping centres, residential and commercial complexes, convention halls, universities and performing arts venues that form the heart of Montreal's central business district, colloquially referred to as Downtown Montreal. The name refers to the underground connections between the buildings that compose the network, in addition to the network's complete integration with the city's entirely underground rapid transit system, the Montreal Metro. Moreover, the first iteration of the Underground City was developed out of the open pit at the