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The United States biological weapons program officially began in spring 1943 on orders from U.S. President Franklin D. Roosevelt. Research continued following World War II as the U.S. built up a large stockpile of biological agents and weapons. Over the course of its 27-year history, the program weaponized and stockpiled seven bio-agents ...
Retrospective video on the Montreal Protocol and the collaboration between policy-makers, scientists, and industry leaders to regulate CFCs. The Montreal Protocol on Substances That Deplete the Ozone Layer is an international treaty designed to protect the ozone layer by phasing out the production of numerous substances that are responsible for ...
A topographic map of the United States The United States is the world's third-largest country by total area behind Russia and Canada. [d] [162] [163] The 48 contiguous states and the District of Columbia occupy a combined area of 3,119,885 square miles (8,080,470 km 2 ).
Hemp in the United States is a legal crop. It was legal in the 18th and 19th centuries, then production was effectively banned in the mid-20th century, and it returned as a legal crop in the 21st century. By 2019, the United States had become the world's third largest producer of hemp, behind China and Canada. [1]
This is a list of capital cities of the United States, including places that serve or have served as federal, state, insular area, territorial, colonial and Native American capitals. Washington, D.C. has been the federal capital of the United States since 1800. Each U.S. state has its own capital city, as do many of its insular areas.
v. t. e. The Northwest Ordinance (formally An Ordinance for the Government of the Territory of the United States, North-West of the River Ohio and also known as the Ordinance of 1787 ), enacted July 13, 1787, was an organic act of the Congress of the Confederation of the United States. It created the Northwest Territory, the new nation's first ...
t. e. Women's suffrage, or the right of women to vote, was established in the United States over the course of the late 19th and early 20th centuries, first in various states and localities, then nationally in 1920 with the ratification of the 19th Amendment to the United States Constitution. [2] The demand for women's suffrage began to gather ...
Several states of the United States prohibit cousin marriage. [1] [2] As of February 2014, 24 U.S. states prohibit marriages between first cousins, 19 U.S. states allow marriages between first cousins, and seven U.S. states allow only some marriages between first cousins. [3] Five states prohibit first-cousin-once-removed marriages. [4]