election offices are targeted with suspicious letters. more than a dozen have been sent across the country. one confirmed to be laced with fentanyl. the latest on the federal investigation and whether officials believe these letters are connected just ahead. also, wherever you go, it seems that screen is flipped around, and you re faced with pressing math questions. has tipping gone too far? new polling ahead. we re following these major developing stories and many more all coming in right here to cnn news central. israel s war on hamas intensifying on the streets of gaza. before we show you some new footage, we want to warn you some of these images are disturbing. this new video shows people trapped under rubble. buildings collapsed by israeli barrages on thursday, victims being pulled out of the rubble in a desperate search for survivors. today gunfire sent palestinian civilians near one hospital in northern gaza scrambling for safety. it comes amid reports that isr