Why users of Mexico City's metro say this week's bridge collapse was a disaster waiting to happen.
Capital and largest city of Mexico
Mexico City is the capital and largest city of Mexico and the most populous city in North America. Mexico City is one of the most important cultural and financial centers in the world. It is located in the Valley of Mexico, a large valley in the high plateaus in the center of Mexico, at an altitude of 2,240 meters (7,350 ft). The city has 16 subdivisions known as boroughs or demarcaciones territoriales.
Mexico City media coverage
At least 13 people were killed and 70 were hurt when an over-bridge ferrying Mexico City metro train cars collapsed in the middle..
Emergency medical crews and firefighters comb through wreckage looking for survivors after collapse of overpass in Mexico City.