Ukraine has come a long way and made tremendous progress over the past three decades, but today the country faces two key challenges, according to Steven Pifer, former deputy assistant secretary of state in the Bureau of European and Eurasian Affairs and former U.S. ambassador to Ukraine.
Ukraine-U.S. Relations
UkrInform: Pifer sees Russian aggression, reforms as main challenges for Ukraine

Pro-Russian rebels board a bus during a prisoner exchange between Ukraine and Russia-backed forces near the Mayorsk checkpoint on Dec. 29, 2019.