Our melting planet: James Longman reports from 'extraordinary' Arctic Circle.

ABC’s James Longman reports from the Arctic Circle on a disaster unfolding every hour, of every minute, of every day and why we all need to be paying attention to Greenland’s melting ice sheets.

Watch video on channel "ABC News"
Concerns grow over new COVID-19 variant

Concerns grow over new COVID-19 variant

The omicron variant was first detected in Southern Africa. WATCH FULL EPISODES OF WORLD NEWS TONIGHT: WATCH WORLD NEWS TONIGHT ON HULU: #WorldNewsTonight #Coronavirus #COVID-19 #Omicron #OmicronVariant

Shoppers and police on high alert over rise in smash-and-grab robberies.

Shoppers and police on high alert over rise in smash-and-grab robberies.

Authorities in Los Angeles arrested four men they suspect were part of a robbery at a Home Depot on Black Friday.

Will supply chain issues affect Cyber Monday?

Will supply chain issues affect Cyber Monday?

Millions of consumers prepare to take to the web in search of good deals.

Record number of passengers expected to pass through TSA checkpoints.

Record number of passengers expected to pass through TSA checkpoints.

Travel numbers around the nation are now nearing pre-pandemic levels.

Omicron variant will 'inevitably' be in US: Fauci

Omicron variant will 'inevitably' be in US: Fauci

George Stephanopoulos interviews Dr. Anthony Fauci on "This Week."