Today on CNN 10, it's debate night in America and we're breaking down the rules as the two presidential candidates face off for the first time. We'll learn about an environmental threat in the Red Sea that officials are racing to salvage. We'll also learn how a CNN Hero is bettering the lives of people who share the same inherited disease that she has. And we'll see how one baker is bringing the taste of home to US troops abroad- all this and more on CNN 10!

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