In an exclusive interview, ABC's Martha Raddatz asks Secretary of Defense Lloyd Austin how far the US will go to guarantee safe access to the Kabul airport. The FDA is poised to fully approve the Pfizer coronavirus vaccine. And California Gov. Gavin Newsom hits the road to campaign for his own job.

As thousands of children are quarantined away from school, economists worry about whether parents will return to the workforce. Afghans begin protests against the Taliban. And airlines are offering regular self-defense courses to embattled flight attendants.

In a special edition of Start Here, George Stephanopoulos recounts his exclusive interview with President Biden. And as chaos descends on Kabul, a young Afghan describes fleeing to America, while her sister is forced into hiding.

Taliban leaders hold a press conference, insisting women will have rights -- "within the limits of Islam." The Biden Administration is expected to recommend booster shots to virtually all Americans. And the trial of R. Kelly begins.

The Taliban have taken over Afghanistan; how likely is the reestablishment of terror training camps that threaten the US? Haiti suffers a tropical deluge on the heels of another devastating quake. And, what a federal probe of Tesla could mean for assisted driving technology.

The Taliban encircles, then quickly takes over, the last major Afghan city remaining under government control. Hospitals become more crowded as COVID infections quickly escalate among young people. And wildfires as far north as Siberia continue to ignite concerns over climate change.

In a stunning turn, the Taliban appears to capture Afghanistan's second largest city. The CDC prepares to recommend third-dose booster shots of Pfizer and Moderna to immunocompromised people. And new census data show the US becoming more urbanized, and less white -- all of which could have a big impact on congressional districting.

The FDA is expected to authorize a third dose of Pfizer and Moderna vaccines for immunocompromised Americans. The Taliban takes over more land, more quickly, than the White House thought possible. And the NCAA disciplines Baylor University for recruitment violations...but nothing for a slew of sexual assault allegations.

Embattled New York governor Andrew Cuomo resigns. A Florida school board defies governor Ron DeSantis over mask mandates. And experts beg the EPA to examine a potentially dangerous chemical that's showing up in water pipes nationwide.

The bipartisan infrastructure bill finally gets its big vote in the Senate. The FDA nears full approval of some Covid vaccines. And massive wildfires in Greece leave residents alarmed.