As reported by Censor.NET citing Ukrinform, this was announced by the U.S. Defense Secretary Ash Carter speaking in one of the New York universities.
Carter said that the U.S. wanted Ukraine to be able to decide on its growth area, and that has been questioned by Russia.
Economic sanctions are the major instrument against Russia, Carter said, adding that the U.S. and Europe are key players in the process. He also noted that the European trade volumes have been affected negatively due to the sanctions.
The Defense Secretary also said that along with the sanctions, the U.S. helps the Ukrainian army to improve its professionalism and increase its chances to fight the mean campaign held by Russia against them. This aggression, Carter noted, has to be stopped before spreading to Europe.