Vice President Joe Biden said Wednesday that the United States will follow militant group ISIS "to the gates of Hell."

"The American people are so much stronger, so much more resolved than any enemy can fully understand," Biden said in the wake of the killing of a second American journalist by the extremist group. "As a nation we are united and when people harm Americans we don’t retreat, we don’t forget."

"We take care of those who are grieving and when that’s finished, they should know we will follow them to the gates of Hell until they are brought to justice because Hell is where they will reside," he said.