The USSR set off the largest nuclear explosion in history, detonating a 50 megaton bomb (2600 times the Hiroshima bomb) in an atmospheric test over the Novaya Zemla Islands, October 30 1961.

The USSR set off the largest nuclear explosion in history, detonating a 50 megaton bomb (2600 times the Hiroshima bomb) in an atmospheric test over the Novaya Zemla Islands, October 30 1961.

The US federal income tax was first enacted in 1862 to support the Union’s Civil War effort. It was eliminated in 1872, revived in 1894 then declared unconstitutional by the Supreme Court the following year. In 1913, the 16th Amendment to the Constitution made the income tax a permanent fixture in the US tax system.

The US federal income tax was first enacted in 1862 to support the Union’s Civil War effort. It was eliminated in 1872, revived in 1894 then declared unconstitutional by the Supreme Court the following year. In 1913, the 16th Amendment to the Constitution made the income tax a permanent fixture in the US tax system.