On this day in 1951, during the Korean War, Chinese and North Korean forces captured Seoul.
On this day in 1974, US President Richard Nixon refused to hand over materials subpoenaed by the Senate Watergate Committee.
On this day in 2007, the 110th United States Congress convened, electing Nancy Pelosi as the first female Speaker of the House in US history.
And on this day in 2010, Burj Khalifa, the world's tallest building, was officially opened.