FILE - In this Sept. 29, 2021, file photo, Defense Secretary Lloyd Austin testifies before the House Armed Services Committee on Capitol Hill in Washington. A new Pentagon plan calls for incorporating the realities of a hotter, harsher Earth at every level in the U.S. military, from making worsening climate extremes a mandatory part of strategic planning to training troops how to secure their own water supplies and treat heat injury. (Rod Lamkey/Pool via AP)
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