With tensions on the rise between the United States and Russia, Washington has been amping up its support for Ukraine, and it could go even further. After an Aug. 24 visit to Kiev, U.S. Defense Secretary James Mattis announced in a joint press conference with Ukrainian President Petro Poroshenko that the United States is "actively reviewing" whether it will provide Ukraine with lethal weapons. Mattis also emphasized that Washington "stands with Ukraine" and is committed to "building the capacity" of the country's armed forces....