Pro Defense's Philip Ewing is traveling with Defense Secretary Ash Carter, as he heads to Silicon Valley. Follow @philewing for the latest.
You can add location information to your Tweets, such as your city or precise location, from the web and via third-party applications. You always have the option to delete your Tweet location history. Learn more
Pro Defense's Philip Ewing is traveling with Defense Secretary Ash Carter, as he heads to Silicon Valley. Follow @philewing for the latest.