Alyson Hurt

An NPR analysis of security footage and photos following the attack on Europe's largest nuclear power plant shows that many of the plant's critical safety systems were in the field of Russian fire.

The first big hurdle was crossed when Pfizer shared its clinical trial data with the FDA. Now there are five more steps to get through before this vulnerable population can be vaccinated.

There are a couple of big steps to get through before U.S. kids under 12 might be able to get the vaccine. Here's how the process works and when the shots could arrive.

Many Americans are now eligible for a COVID vaccine booster. Are you? Our quiz will help you figure it out.

View NPR's graphics to see where COVID is hitting hardest in the U.S., which state outbreaks are under control and where cases are still spreading.

New estimates say the U.S. needs to triple its testing. But how much testing does each state need? Here's how states compare to each other, and to targets experts say they should hit.

The Democratic presidential field started out as the most diverse ever, and the largest in at least 40 years. It's since winnowed down to one.

Now that the House has impeached President Trump, the process shifts to the Senate, which will vote on whether to convict him. Here is your guide to the steps and the people that matter.

Democrats are unified against President Trump's immigration stances, but many do not have clear positions on specific policies related to border security and immigration levels.

While most Democratic presidential candidates support the goals laid out in the Green New Deal, they differ on specifics like a carbon tax, nuclear energy and federal spending to fight climate change.