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Wildfires destroy homes, force evacuations in Greece.

Wildfires destroy homes, force evacuations in Greece.

More than 100 fires have burned through the region as it experiences one of its worst heat waves in three decades.

ABC News Update: FDA full approval of Pfizer vaccine could be just weeks away.

ABC News Update: FDA full approval of Pfizer vaccine could be just weeks away.

Plus, mask mandate debates rage as students go back to school and wildfires force evacuations in Greece. WATCH the ABC News Live Stream Here: SUBSCRIBE to ABC NEWS: Watch More on LIKE ABC News on FACEBOOK FOLLOW ABC News on TWITTER: #ABCNLUpdate #...

Mask debates rage as schools reopen while delta variant spreads.

Mask debates rage as schools reopen while delta variant spreads.

American Federation of Teachers President Randi Weingarten says the most challenging year for teachers is starting now.

Allyson Felix looks to make history in her fifth Olympics.

Allyson Felix looks to make history in her fifth Olympics.

Plus, a look outside the bubble at host city Tokyo, which is in a state of emergency over surging COVID-19 cases.

An eviction protest, a world record and a factory fire: World in Photos, August 4.

An eviction protest, a world record and a factory fire: World in Photos, August 4.

A look at the top photos from around the globe.