Russia's War Against Ukraine
OP-ED
Bennett Ramberg: Why the US has an obligation to help Ukraine defend itself
US President Barack Obama (R) talks with Ukrainian President Petro Poroshenko during a bilateral meeting in the Oval Office of the White House in Washington, DC, Sept. 18.
With Russian tanks and other military equipment rolling into Ukraine, Kyiv is learning the hard way that when you reside in a nasty neighborhood it doesn't pay to get rid of nuclear weapons without ironclad security guarantees. But that is exactly what it did in December 1994 when it agreed to the Budapest Memorandum on Security Assurances co-signed by the United States, Russia and the United Kingdom.
