NOW: President Trump arrives in Pennsylvania for the historic Defense and Innovation Summit, where he was welcomed by a cordon of 75 Old Guard troops. [▻](htt

NOW: President Trump arrives in Pennsylvania for the historic Defense and Innovation Summit, where he was welcomed by a cordon of 75 Old Guard troops. [▻](https://video.twimg.com/amplify_video/2077461225680621568/vid/avc1/1280x720/O3L8SxiopiHB5_Rr.mp4)