How to perform CPR until help arrives

After you've called 911, CPR can make all the difference in keeping someone alive until professional help arrives. With the help of a certified lifeguard, TODAY national investigative correspondent Jeff Rossen demonstrates the correct way to perform CPR.

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After you’ve called 911, CPR can make all the difference in keeping someone alive until professional help arrives. With the help of a certified lifeguard, TODAY national investigative correspondent Jeff Rossen demonstrates the correct way to perform CPR.