the couple now missing after renting jet skis. and the separate case, the virginia doctor and his tour guide killed. there is news tonight about the missing college student. new images just released from the airport and what authorities revealed just today. the new health headline tonight about prescription drugs and dementia. and america strong tonight. the iraq war veteran and what he did to save his platoon. good evening. and it's great to have you with us here on a tuesday night. and we begin tonight with that sudden resignation of america's acting border chief. after just two months on the job, john sanders has now resigned. tonight, the president saying he doesn't think he ever spoke to him. and this all comes amid the reports of hundreds of migrant children living in awful conditions at a facility in clint, texas. sources telling abc news tonight sanders' departure has, quote, nothing to do with what was uncovered involving those