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Darren Riley started JustAir with a mission to make sure everyone has access to clean air -- no matter where you live.

During a CNN Republican presidential town hall, former New Jersey Gov. Chris Christie tells CNN's Anderson Cooper about the conversation he had with former President Donald Trump while he was in the hospital with Covid-19.

Former President Donald Trump's plane has landed in Miami International Airport ahead of his scheduled court appearance and arraignment on Tuesday. He is expected to meet his lawyers today and discuss a Florida-based legal team, sources tell CNN.

During a CNN Republican presidential town hall, former New Jersey Gov. Chris Christie tells CNN's Anderson Cooper why he believes a potential Trump second term would be worse than the first.

Walt Nauta is the personal aide to Trump who's also indicted in the documents case, accused of moving boxes of documents and lying about it. Could he flip?

Drone video allegedly shows Ukrainian victories in the war, as video released by the Russian defense ministry allegedly shows victories of their own. Meanwhile, tensions rise between Russia's military and the Wagner company, Russia's private military. CNN's Fred Pleitgen reports.

Carrie Cordero and Nick Akerman join The Lead.

CNN's Evan Perez reports.

CNN's Paula Reid reports.

Manchester played its part as City celebrated its treble with an open-top bus parade through the Manchester City cetnre on Monday. Players, fans and coaches were all in fine-spirits as they celebrated only the 8th -ever treble in football history.

CNN meteorologist Chad Myers explains how quickly smoke can affect air quality and the importance of remaining inside during air quality alerts.

Arturo Varvelli, an expert on Italian foreign policy, says Silvio Berlusconi was one of the first world leaders to change the approach towards foreign policy.

House Speaker Kevin McCarthy defends former President Donald Trump's alleged decision to keep classified documents in his Mar-a-Lago resort.

Researchers used tiny trackable 'pants' on poison frogs in South America to learn more about how they navigate. CNN's Linda Kinkade reports.

Wildlife trappers were dispatched to remove a "massive" crocodile from a swimming pool in Plantation Key, Florida.

Adam Kinzinger, the former Republican congressman who voted to impeach then President Donald Trump, joins CNN's Zain Asher to discuss Trump's 37-count indictment in the classified documents probe.

President Zelensky's Chief Diplomatic Adviser Igor Zhovkva talks to Christiane Amanpour about the beginning of Ukraine's counteroffensive and Kyiv's ultimate goals.

The ensemble cast of the new horror spoof discuss on-set laughter and friendships. David Daniel reports; Topher Gauk-Roger contributed to this story.

Former Israeli Prime Minister and opposition leader Yair Lapid takes the stand at Benjamin Netanyahu's corruption trial. CNN's Hadas Gold has the details

Ukraine's Environment Minister Ruslan Strilets says the Kakhovka reservoir has lost 72% of its water after the dam breach in Southern Ukraine