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Artículos sobre United States

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Damage in Mayfield, Kentucky, after a tornado swept through the area on Dec. 11, 2021. Brett Carlsen/Getty Images

Why the southern US is prone to December tornadoes

Tornadoes in December aren’t unusual in the Gulf Coast and lower Mississippi Valley states, but the Dec. 10-11 outbreak was extreme and far-reaching.
The International Space Station is a great example of how space has, for the most part, been a peaceful and collaborative international arena. NASA Marshall Spaceflight Center/Flickr

Space law hasn’t been changed since 1967 – but the UN aims to update laws and keep space peaceful

Activities in space today are far more numerous and complicated compared to 1967, before humans had landed on the moon or Elon Musk had been born. Two experts explain the need for better laws to keep space peaceful.
The $1 trillion bill was a heavy lift for Speaker Nancy Pelosi (center). Next up: the budget reconciliation bill known as Build Back Better. Anna Moneymaker/Getty Images

Congress passes $1T infrastructure bill – but how does the government go about spending that much money?

The government uses a process called public procurement. A professor of public policy explains how the process works and how it is increasingly used to achieve social goals.

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