Pfizer reveals potential vaccine breakthrough amid presidential transition.

Former Homeland Security Adviser Tom Bossert -- also an ABC News contributor -- discusses Pfizer’s latest vaccine data and how the presidential transition could impact a vaccine rollout.

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World Cup victory for Team USA

World Cup victory for Team USA

The Americans won despite losing star Christian Pulisic to injury. ABC News’ Mona Kosar Abdi reports on his recovery.

Tornado outbreak strikes the South

Tornado outbreak strikes the South

At least 15 twisters have touched down so far across the region. ABC News’ Mona Kosar Abdi reports.

Hero dog saves owner

Hero dog saves owner

A man in Kansas is crediting his dog with saving his life by waking him up after a fire broke out in his home. ABC News’ Will Ganss has his incredible story.

Why ‘Love Actually’ is a beloved holiday hit for 20 years: Part 1.

Why ‘Love Actually’ is a beloved holiday hit for 20 years: Part 1.

Diane Sawyer interviewed many of the people who helped create the 2003 film to understand its lasting success, and to hear about love then and now. “The Laughter & Secrets of Love Actually: 20 Years Later – A Diane Sawyer Special” on hulu: #ABCNew...

‘Love Actually’ director gives behind-the-scenes look at iconic scenes: Part 2.

‘Love Actually’ director gives behind-the-scenes look at iconic scenes: Part 2.

Richard Curtis spoke with Diane Sawyer about creating the film's intertwined stories of love and iconic moments, including the Prime Minister’s dance scene made infamous by actor Hugh Grant.