6 AM ET: Iowa's big day, life threatening cold, rich get richer & more

Republican voters in Iowa will be turning out for the first caucuses of 2024. Life threatening temperatures are forecast for parts of the US. A woman and two children have died trying to cross the Rio Grande into the US. While the US congratulates Taiwan's newly elected president, China hits out. Plus, the wealth of the five richest men in the world has doubled since 2020.

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