July 24, 1934

Chicago records its highest temperature ever, 109°F (44°C) as does Milwaukee, Wisconsin, 105 °F (41 °C). Both of these records still stand. Two years later, in July of 1936, Chicago would record temperatures of 100 °F (38 °C) or higher on 12 consecutive days.

Somehow no one thought this was anthropogenic global warming at the time. They thought it was—summer.

July 24, 2001

Silverstein Properties (headed by Larry Silverstein, left) takes out a 99 year lease on the World Trade Center, purchasing control from the New York Port Authority. It is the first time that control of the WTC has changed hands since it was built in 1966.