A desperate search after building collapse

At least five people are still missing after an apartment building collapsed in Iowa. And former first lady Rosalynn Carter was diagnosed with dementia.

👋 Hey! Laura Davis here. Let's get caught up on Tuesday's news!

🧪 But first, a canal conundrum: Officials in Italy have partially solved the mystery after the water in Venice’s Grand Canal turned a shocking Shrek-colored neon green over the weekend.

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5 people missing after Iowa building collapse

Two people are thought to be trapped inside a partially collapsed apartment building in Davenport, Iowa, city officials said Tuesday, more than 36 hours after the rear face of the structure came down. The two people are part of a group of five that are unaccounted for in the wake of the collapse. City officials have offered conflicting information about the possibility of residents still trapped inside and raised questions about the timeline for tearing down the six-story structure. One resident was rescued from the fourth floor Monday evening, just hours after city officials announced plans to demolish the building. 👉 Here's the latest on the situation.

• Photos: Friends, family look for loved ones after apartment building crumbles.

A bloody Memorial Day weekend

Memorial Day weekend was deadly across America. At least 20 mass shootings left 16 people dead and over 80 injured as gun violence erupted across the U.S. from Friday afternoon through Monday night, according to the Gun Violence Archive.

• Where bloodshed began: A 20-year-old man in Arizona was accused of killing four people and injuring one more in five different shootings in the Phoenix area. Over the next three days, people were killed and injured in Virginia, Mississippi, New Mexico, Illinois and more.

• And on Monday evening, as Memorial Day revelers in Hollywood Beach, Florida, celebrated the holiday, nine people were injured by gunfire during a shootout between two groups along a boardwalk.

🔍 Here's what we know about the weekend's shootings.

What everyone's talking about

• The cause of SIDS remains a mystery – but scientists may have found a promising new clue.

• The John Coughlin sex scandal rocked U.S. Figure Skating. Now a supporter of his has been hired.

• Is the government coming for your gas stove? How outrage brought culture wars to the kitchen.

• New Duggar family documentary 'Shiny Happy People' alleges there was a secret cult of abuse.

• Warn your kids: 6 out of 10 fake prescription pills are laced with fentanyl.

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Russia issues arrest warrant for Sen. Lindsey Graham

Sounds like Lindsey Graham won't be traveling to Russia anytime soon. Russia’s Interior Ministry issued an arrest warrant for Graham after the South Carolina Republican's comments related to the fighting in Ukraine. In an edited video of his meeting Friday with Zelenskyy, Graham noted that "the Russians are dying" and described the U.S. military assistance to the country as "the best money we’ve ever spent."

👉 More updates: At least eight armed Ukrainian drones targeted the Moscow region early Tuesday, Russian authorities said, damaging several buildings and bringing the war home to Russia after 15 months of destruction across Ukraine's cities. Here's the latest.

• She's a video game marketer by day, an ammo hunter for Ukrainian soldiers by night.

• A mother's gratitude: Ukrainian boy 'was dying on the operating table, and they saved him.'

Former first lady Rosalynn Carter diagnosed with dementia

The wife of former President Jimmy Carter and longtime mental health advocate Rosalynn Carter has dementia, her family announced Tuesday. Rosalynn Carter, now 95, remains at home in Plains, Georgia, with her husband of 77 years, Jimmy Carter, 98, who has been at home receiving hospice care since early this year. Rosalynn Carter has spent decades urging for better access to care and decreasing the stigma around mental health issues. Keep reading.

A break from the news

• 📚 Add to book pile: 10 page-turning thrillers you won't be able to put down this summer.

• 🏞 Hear me out: Ski resorts are actually even more fun in the summertime. 

• 🛍 Act fast! Memorial Day may be over but these 200+ Amazon deals are still available.

Laura L. Davis is an Audience Editor at USA TODAY. Send her an email at laura@usatoday.com or follow along with her adventures – and misadventures – on Twitter. Support quality journalism like this? Subscribe to USA TODAY here.

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This article originally appeared on USA TODAY: Iowa building collapse, Rosalynn Carter, gun violence: Tuesday's news.