Doctors explain choice to enroll young kids in Pfizer vaccine trials.

Dr. Erin Biro and her husband Dr. CJ Bui explain why they felt strongly about vaccinating their children against COVID-19 as the nation reflects on 1 million lives lost to COVID-19.

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When rioters chanted 'hang Mike Pence' Trump said 'he deserves it': Aide.

When rioters chanted 'hang Mike Pence' Trump said 'he deserves it': Aide.

Several staffers resigned following former President Donald Trump's comments about former Vice President Mike Pence

President Biden arrives in Madrid for NATO summit

President Biden arrives in Madrid for NATO summit

ABC News White House correspondent MaryAlice Parks and foreign correspondent Tom Soufi Burridge on the NATO summit and the recent shopping mall attack in Ukraine.

Trump became physically confrontational on Jan. 6 aide testifies to committee

Trump became physically confrontational on Jan. 6 aide testifies to committee

Former President Donald Trump allegedly reached for the steering wheel and lunged at staffer after being told he couldn't go to the Capitol.

White House lawyer warns of criminal charges ahead of Jan.

White House lawyer warns of criminal charges ahead of Jan.

Cassidy Huthinson testified about the concerns some White House staff had about President Trump wanting to go to the Capitol with his supporters on Jan. 6.

Biden prepares to meet with NATO allies in Europe

Biden prepares to meet with NATO allies in Europe

ABC News' MaryAlice Parks discusses President Joe Biden’s push for Finland and Sweden to become full members in a NATO summit scheduled for Tuesday.