investigators say deland may have had trouble adjusting dure his semesterser abroad and left the campus voluntarily. deland parents saith out of character for him to be out of touch so long. to ukraine where russian forces continue their relentless bombardment in the south. the city of odesa was plunged into darkness. in the east russian drones struck a village near the front lines. today the pentagon said russia is depleting it stockpile of artillery and rockets and using ammunition more than 40 years old. american scientists are expected to announce tomorrow that for the first time they ve successfully generated energy through nuclear fusion. as cbs s manuel bojorquez reports, the breakthrough may have tapped into a limitless source of clean energy. reporter: it s the stuff of science fiction movies. when we master this technology reporter: harnessing nuclear fusion, duplicating the process that powers the sun.