laila: tuong vu from the university of oregon. new investigation into a plane crash that killed poland's former president was politically motivated. and happens in russia -- it happened in russia in 2010. while polish investigators spent eight hours questioning tusk, who was prime minister at the time of the incident, they accuse russia and donald tusk himself. the foreign ministers of russia and the u.s. will meet next week to discuss the state of relations between their two countries. it comes one day after donald trump signed a fresh sanctions against moscow because of its meddling in the 2016 elections. the prime minister has described these sanctions as tantamount to a full-scale trade war. alright, now to that medical breakthrough, an international team of scientists has used genetic editing to remove a faulty gene from human embryos. this milestone in the fight against inherited diseases is controversial. any changes would be passed on to future generations without knowing about the side effects that may also be passed on.