On the Ground in Mexico City in the Hours After the Quake

At 11 a.m. yesterday, residents in offices, schools and housing estates across Mexico City took part in an earthquake drill timed to commemorate the catastrophic tremor on the same date in 1985. Just over two hours later, a real, 7.1 magnitude quake shook the capital and surrounding states, making skyscrapers sway like they were made of paper, shattering windows and roofs, and toppling entire apartment blocks.