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In a Memorial Day special, Brad asks ABC's Senior Foreign Correspondent Ian Pannell to reflect on his many reporting trips to Afghanistan, and to examine the legacy of America's presence -- and impending withdrawal.

Investigators reveal new details about a mass shooter's guns, ammo, and grudges against his workplace. Airlines prepare for their first truly busy weekend since the pandemic began. And legal analysts question whether a new social media law outlawing "de-platforming" for political candidates is legal.

A gunman opens fire on a California railyard. President Biden asks the intelligence community to investigate where the novel coronavirus came from a lab. And Amazon spends $8 billion acquiring MGM.

New data indicate dramatic efficacy in COVID vaccines. A special grand jury considers a potential indictment for President Trump. And Secretary of State Antony Blinken advocates for investment in Palestinian territories.

One year after George Floyd was killed by Minneapolis police, American cities are still struggling with how to reform and fund their police departments. The nation's largest school district says virtual learning will not be an option in the fall. And airlines scramble to change flight patterns to avoid another Belarus "hijacking."

While police reform legislation continues to be debated on Capitol Hill, activists prepare to mark the one-year anniversary of George Floyd's death. Belarus is being accused of "air piracy" after it grounded a commercial airplane in order to arrest one man. And consumers are starting to feel the effects of a global semiconductor shortage.

After more than 10 days of violence and death, Israeli leaders agree to a ceasefire with Hamas. The BBC is apologizing to the royal family for the way it obtained a bombshell interview with Princess Diana. And we speak to a police officer after an ABC News analysis finds departments in most major metropolitan areas don't look anything like the communities they serve.

Amid confusion, CDC Director Dr. Rochelle Walensky faces frustrated members of Congress. The White House pushes Israel to scale back its military campaign in Gaza. And human rights activists are pressing for a boycott of next year's Beijing Olympic Games.

North Carolina prosecutors announce that officers were "justified" in shooting Andrew Brown, Jr. Israel faces growing calls for a cease-fire with Gaza. And a commission to study the siege at the US Capitol hits a dead end in Congress.

The Supreme Court announces it will hear a direct challenge to Roe v. Wade, encouraging anti-abortion rights activists. AT&T reverses course in its acquisition of media companies, paving the way for another mega-network. And an associate of Rep. Matt Gaetz pleads guilty to sex trafficking.