White House national security adviser Jake Sullivan on Sunday condemned Russia for what he called the "shocking and horrifying" killing of an American journalist in Ukraine by Russian forces and vowed the U.S. would respond with "appropriate consequences" once the Biden administration obtains more information about the death. "This is obviously shocking and horrifying, and I've just learned about it as I came onto air here, so I will be consulting with my colleagues, we'll be consulting with the Ukrainians to determine how this happened and then to measure and execute appropriate consequences as a result of it," Sullivan told...