Heat kills thousands of people across the U.S. every year. The risk is especially high for the millions of Americans who live in manufactured housing like mobile homes and trailers.

Fifth graders calm school kindergartners in Los Angeles. Kids take the "bike bus" in Oklahoma. High school students take in a new high school building in Oregon.

The peptide is supposed to deliver flawless and firm skin, promote wound healing and other anti-aging effects. So what's the evidence behind GHK-Cu?