members from around the world to thank them for the service. president biden told them quote, you make me proud i really mean that from the bottom of my heart. back to dateline extra. >> welcome back to "dateline." i'm natalie morales. in the months after her disappearance, skylar high school friend were still worried that skyla are not been found. variation were convinced that her friend knew of it. both girls were sticking to story but that was about to change. one of them was ready to start. here is andrea canning with more of "something wicked." christmas 2012 came and went for skylar neeses'parents dave and mary. it had been six months since skylar had disappeared. the holidays must have been very hard that year, christmas time. >> we didn't celebrate. >> nah. we didn't put up any tree. we didn't do anything. >> just another day. >> yep. >> around that time, rachel shoaf and sheila eddy stopped attending university high. their few remaining friends told the authors dave and may that rachel seemed agitated. >> she was acting out, getting into more family altercations at home.