 It hit an apartment building near a branch of the U.S. Embassy. There was no Israeli air siren to warn people of incoming fire. Houthi rebels in Yemen say they fired the drone. They say it's in retaliation for Israel's offensive in Gaza. In the U.S., hotter-than-usual weather this summer is leading to higher electricity bills. NPR's Scott Horsley reports some families are sweating to keep their costs in check.