Charges: Bryan Demarais shot and killed wife while their 2 children were home

Tonight, the long 2024 primary season begins in Iowa with the caucuses.

What to know:

• Here’s what to expect tonight in the 2024 Iowa caucuses
• After months of campaigning, the Republican candidates vying to unseat President Joe Biden in November are facing their first formal test from voters.
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Could a daring experiment help our planet or is it a dangerous distraction?