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The Senate is set to begin another impeachment trial of former President Donald Trump, this time considering whether he incited an insurrection before leaving office. President Biden expresses hope that 300 million Americans can get vaccinated by the end of the summer. And climate scientists are worried that mountain regions are becoming more prone to avalanches.

As fans gathered in Tampa, scientists were encouraged about falling COVID case numbers...but are now concerned that they could quickly rise again. Congressional Democrats move forward with a relief bill without Republican support. And in the days after a coup, Myanmar citizens protest against the military.

As fans gathered in Tampa, scientists were encouraged about falling COVID case numbers...but are now concerned that they could quickly rise again. Congressional Democrats move forward with a relief bill without Republican support. And in the days after a coup, Myanmar citizens protest against the military.

After Republicans refuse to demote Rep. Marjorie Taylor Greene over extremist comments, House Democrats force her off her committees. President Biden issues a message to the State Department, along with the world. And the International Olympic Committee issues a "COVID playbook" in hopes that the Games can still be salvaged.

After Republicans refuse to demote Rep. Marjorie Taylor Greene over extremist comments, House Democrats force her off her committees. President Biden issues a message to the State Department, along with the world. And the International Olympic Committee issues a "COVID playbook" in hopes that the Games can still be salvaged.

Behind closed doors, Republican lawmakers debate whether to demote Rep. Marjorie Taylor Greene. Oxford researchers measure whether a new vaccine definitively cuts down on virus transmission. And President Biden's new DHS secretary prepares to overhaul immigration policies.

Behind closed doors, Republican lawmakers debate whether to demote Rep. Marjorie Taylor Greene. Oxford researchers measure whether a new vaccine definitively cuts down on virus transmission. And President Biden's new DHS secretary prepares to overhaul immigration policies.

An investigation from ABC News finds disagreement between players and the NFL over whether Black players should be graded on a different scale during concussion examinations. House impeachment managers and former President Trump's legal team unveil their case strategies. And a Florida shootout results in the bloodiest day for the FBI in decades.

An investigation from ABC News finds disagreement between players and the NFL over whether Black players should be graded on a different scale during concussion examinations. House impeachment managers and former President Trump's legal team unveil their case strategies. And a Florida shootout results in the bloodiest day for the FBI in decades.

President Biden invites GOP senators to the White House to discuss a COVID relief bill. The CDC analyzes which demographics are getting vaccinated the most quickly. And a coup in Myanmar exposes a diplomatic blind spot for the US.