Fighting between the U.S. and Iran flares up again, putting new strain on efforts to end the conflict.Plus, the biggest danger from a chemical emergency in Southern California appears to be backing off. But thousands of people still can’t return home as crews monitor a troubled tank for any new problems.And President Donald Trump heads back to Walter Reed National Military Medical Center for another “routine annual” checkup — his third in a little over a year.These stories and more highlight your Unbiased Updates for Tuesday, May 26, 2026.