These are the headlines you Need2Know:
* **Trump Threatens Iran on Twitter:**
President Trump lashed out against Iranian President Hassan Rouhani late Sunday, warning him -- in an all-caps [tweet](https://twitter.com/realDonaldTrump/status/1021234525626609666) -- to "never, ever threaten the United States again or you will suffer the consequences the likes of which few throughout history have ever suffered before." His tweet comes in response to Rouhani's warning to Trump that "war with Iran is the mother of all wars." Read the details on [NPR.](https://www.npr.org/2018/07/23/631454795/trump-to-irans-president-never-ever-threaten-the-u-s-again)
* **Deadly Shooting in Toronto:**
Two people died and a dozen others were wounded in Toronto after a shooter opened fire in a popular neighborhood late Sunday. Neither of the victims has been identified. Authorities say the gunman is also dead, and they are now investigating the motive behind the shooting. Read the latest on [CNN.](https://www.cnn.com/2018/07/22/americas/toronto-restaurant-shooting/index.html)
* **Mourning Boat Accident Victims:**
The 17 victims of the duck boat accident in Missouri were remembered in a service on Sunday near the site of the accident. The memorial came as federal investigators are examining the boat's black box and video footage. Read more at [CBS News.](https://www.cbsnews.com/news/branson-community-mourns-missouri-duck-boat-victims-today-2018-07-22/)
* **Italian Wins the British Open:**
Francesco Molinari claimed the Claret Jug on Sunday, becoming the first Italian to win a major. He outlasted Tiger Woods, Jordan Spieth, Rory McIlroy and others to secure the prize. Read more at [BBC.](https://www.bbc.com/sport/golf/44918313)
Cheddar's Hope King gets into the latest.
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Capitol hill is trying to get to the bottom of the bank collapses that shocked the financial system last month, and today lawmakers grilled banking regulators about why they weren't able to stop the crisis. Cheddar News correspondent Lisa Bennatan broke down the proceedings.
Juul will finally have its day in court for its role in the teen vaping epidemic. The Minnesota attorney general is preparing for opening arguments in the state's lawsuit against the vape maker. Here to break down the complicated backstory for this legal case is Senior Reporter Chloe Aiello.
The Supreme Court will decide whether a disabled activist can file disability rights lawsuits against hotels she doesn't intend to visit.
Massachusetts Democratic U.S. Sen. Elizabeth Warren announced Monday that she will seek a third term in 2024.
The Biden administration has issued a statement saying it will veto a GOP-led bill aimed at bringing down energy costs by making it easier for energy companies to get permits for domestic drilling.
House Speaker Kevin McCarthy said lawmakers will move forward with a bill to address national security worries about TikTok.
President Joe Biden’s choice to run the Federal Aviation Administration has withdrawn his nomination, a setback for the administration that comes after Denver International Airport CEO Phillip Washington appeared to lack enough support in the closely divided Senate.
Facing a potential indictment, Donald Trump took a defiant stance at a rally Saturday in Waco, disparaging the prosecutors investigating him and predicting his vindication as he rallied supporters in a city made famous by deadly resistance against law enforcement.
While data privacy still remains one of TikTok's biggest challenges, it may face a larger problem in order to stay in the United States: content moderation.
King Charles III's visit to France was postponed because of ongoing protests.
