During the Great Depression, the Empire State Building was built, from the beginning of foundation excavation to official opening, in 410 days (less than 14 months). After the destruction of the World Trade Center in New York on September 11, 2001, design and construction of its replacement, the new One World Trade Center was completed on November 3, 2014, 4801 days (160 months) later.
In the 1960s, from U.S. president Kennedy’s proposal of a manned lunar mission to the landing of Apollo 11 on the Moon, 2978 days (almost 100 months) elapsed. In January, 2004, U.S. president Bush announced the “Vision for Space Exploration”, aimed at a human return to the lunar surface by 2020. After a comical series of studies, revisions, cancellations, de-scopings, redesigns, schedule slips, and cost overruns, its successor now plans to launch a lunar flyby mission (not even a lunar orbit like Apollo 8) in June 2022, 224 months later. A lunar landing is planned for no sooner than 2028, almost 300 months after the “vision”, and almost nobody believes that date (the landing craft design has not yet begun, and there is no funding for it in the budget).... [Read More]