ABC: "We obviously will ensure that a U.S. response is proportional." By Arlette Saenz
'"It is unlikely that our response would be announced in advanced. It’s certainly possible that the president could choose response options that we never announce," Earnest told reporters aboard Air Force One.
'"The president has talked before about the significant capabilities that the U.S. government has to both defend our systems in the United States but also carry out offensive operations in other countries," he added. "There are a range of responses that are available to the president and he will consider a response that’s proportional."'