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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The Israeli army severed northern Gaza from the rest of the besieged territory and pounded it with airstrikes Monday, preparing for expected ground battles with Hamas militants in Gaza's largest city and an even bloodier phase of the month-old war.
Four men were charged Monday over the theft of an 18-carat gold toilet from Blenheim Palace, the sprawling English country mansion where British wartime leader Winston Churchill was born.
Donald Trump began testifying Monday morning in his civil fraud trial, producing the spectacle of a former president and the leading Republican presidential candidate defending himself against allegations that he dramatically inflated his net worth.
The most-watched races in Tuesday’s off-year general election have all been dominated by the ongoing debate over abortion rights.
Iowa Gov. Kim Reynolds is reportedly planning to endorse Florida Gov. Ron Desantis in the Republican primary.
The endorsement could give DeSantis' campaign a boost as he struggles to show progress against Donald Trump in the Republican primary.
With Donald Trump due on the witness stand next week, testimony from his adult sons in his civil business fraud trial wrapped up Friday with Eric Trump saying he relied completely on accountants and lawyers to assure the accuracy of financial documents key to the case.
The watchdog office overseeing the National Science Foundation is sending investigators to Antarctica's McMurdo Station after hearing concerns about the prevalence of sexual violence at the U.S. research base.
Frederico Klein, a former State Department official, was sentenced to nearly six years in prison after being found guilty on several counts including assault of multiple police officers at the Capitol on Jan. 6.
President Joe Biden and First lady Jill Biden are traveling to Lewiston Maine to pay their respects to the people who were killed there in a mass shooting last week.
