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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Peter Rawlinson, CEO of electric vehicle maker Lucid Motors, joined Cheddar to discuss its new plant in Arizona and hopes for a more supportive policy on EVs from the incoming Biden administration.
The health agency also announced new guidelines that shorten recommended quarantines after close contact with someone infected with coronavirus. Now people can resume normal activity after 10 days, or seven days if they receive a negative test result.
The Transportation Department issued a final rule Wednesday covering service animals. The rule says only dogs can qualify, and they have to be specially trained to help a person with disabilities.
The head of the United Nations is calling on countries to end what he calls a war on nature and instead embrace a future without carbon pollution triggering global warming.
Dr. Anthony Fauci, director of the National Institute of Allergy and Infectious Diseases, discusses a wide range of current topics regarding the COVID-19 pandemic with Cheddar.
An influential government advisory panel says health care workers and nursing home residents should be at the front of the line when the first coronavirus vaccine shots become available.
Attorney General William Barr said Tuesday that the Justice Department has not uncovered evidence of widespread voter fraud and has seen nothing that would change the outcome of the 2020 presidential election.
European regulators say they may approve a coronavirus vaccine developed by drugmakers Pfizer and BioNTech within four weeks.
Americans returning home from Thanksgiving break are facing strict new coronavirus measures around the country as health officials brace for a disastrous worsening of the out-of-control surge because of holiday gatherings over the long weekend.
Federal Communications Commission Chairman Ajit Pai, a Republican, says he is leaving the telecommunications regulator on Inauguration Day.
