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.
Subscribe to the Need2Know newsletter [here.](https://theneed2know.com/)
The Biden administration will significantly loosen federal mask-wearing guidelines to protect against COVID-19 transmission on Friday, according to two people familiar with the matter.
Russian President Vladimir Putin openly invaded the neighboring country of Ukraine on Thursday following weeks of overtures and discussions on keeping an incursion from happening. David Salvo, the deputy director for the Alliance for Securing Democracy, joined Cheddar to go into the Russian leader's motivations. "What I'm sure he understands is that his invasion of Ukraine in 2014 probably ended the discussion of Ukraine joining NATO, even if publicly we won't admit that, that's just the reality. And I'm sure that President Putin understands that," he said, noting that Putin could be using the taking of Ukraine territory as leverage to gain more security concessions from the West.
Following Russia's incursion into Ukraine, the U.S. is warning businesses and major banks to brace themselves for cyberattacks. Lester Munson, a senior fellow at the National Security Institute, joined Cheddar News to break down what this means for financial institutions “So we need to be concerned about not just intentional Russian hacks against American entities but also what Russia is doing in Ukraine. Those things can impact us as well," he said
After weeks of talks and posturing in hopes of staving off an attack, Russia invaded Ukraine on Thursday, an incident that has already impacted the global economy, including the U.S.. Jason McMann, head of geopolitical risk analysis for Morning Consult, joined Cheddar’s Closing Bell to break down what investors might do to prepare themselves as the crisis continues. "I think there are a few things that we have our eye on over at Morning Consult that could cause the situation to become a bit more severe or unstable as far as market outcomes would be concerned," McMann said. "One of those things would be if the U.S. and the EU kind of moved in concerted fashion to block Russia from the SWIFT transaction system. So, I would say that's one thing that would be worth keeping an eye on."
Alex Walker, candidate for Colorado's 3rd Congressional District, joins Cheddar News to discuss why he's running against Lauren Boebert and the inspiration behind his viral campaign ad.
Lisa Hagen, politics reporter for U.S. News and World Report, joins Cheddar News to preview what to expect from President Biden's State of the Union Address on March 1.
Minh-Thu Pham, co-founder of New American Voices, joins Cheddar News to discuss the organization and why new citizens are key to defending U.S. democracy.
Joel Willett, a former CIA operative, joins Cheddar News to discuss Russian President Vladimir Putin officially launching a "special military operation" in Ukraine