President Trump departs Japan

President Donald J. Trump waves from Marine One to media and service members, Nov. 7, 2017, at Yokota Air Base, Japan.

President Donald J. Trump waves from Marine One to media and service members, Nov. 7, 2017, at Yokota Air Base, Japan. Trump was in Japan for three days as part of a 12 day tour of the Indo-Asia Pacific region. (U.S. Air Force photo by Senior Airman Donald Hudson)

POTUS departs Japan

President Donald J. Trump says goodbye to Lt. Gen. Jerry P. Martinez, U.S. Forces Japan and 5th Air Force commander, during his departure, Nov. 7, 2017, at Yokota Air Base, Japan. This marked the first time Trump visited Japan as president. (U.S. Air Force photo by Airman 1st Class Juan Torres)

POTUS departs Japan

President Donald J. Trump speaks to Lt. Gen. Jerry P. Martinez, U.S. Forces Japan and 5th Air Force commander, during his departure, Nov. 7, 2017, at Yokota Air Base, Japan. This marked the first time Trump visited Japan as president. (U.S. Air Force photo by Airman 1st Class Juan Torres)

First Lady Melania Trump shakes hands with Col. Kenneth Moss, 374th Airlift Wing commander, before boarding Air Force One, Nov. 7, 2017, at Yokota Air Base, Japan.

First Lady Melania Trump shakes hands with Col. Kenneth Moss, 374th Airlift Wing commander, before boarding Air Force One, Nov. 7, 2017, at Yokota Air Base, Japan. While in Japan the president spoke to U.S. and Japanese service members from across Japan during a Troop Talk and stressed the importance of the U.S.-Japan alliance. (U.S. Air Force photo by Senior Airman Donald Hudson)

POTUS departs Japan

President Donald J. Trump walks up the stairs to Air Force One during his departure, Nov. 7, 2017, at Yokota Air Base, Japan. This marked the first time Trump visited Japan as president. (U.S. Air Force photo by Airman 1st Class Juan Torres)

President Donald J. Trump and First Lady Melania wave goodbye to media and service members prior to boarding Air Force One, Nov. 7, 2017, at Yokota Air Base, Japan.

President Donald J. Trump and First Lady Melania wave goodbye to media and service members prior to boarding Air Force One, Nov. 7, 2017, at Yokota Air Base, Japan. Trump was in Japan for three days as part of a 12 day tour of the Indo-Asia Pacific region. (U.S. Air Force photo by Senior Airman Donald Hudson)

Air Force One departs Yokota Air Base, Japan, Nov. 7, 2017.

Air Force One departs Yokota Air Base, Japan, Nov. 7, 2017. President Donald J. Trump was in Japan for three days as part of a 12 day tour of the Indo-Asia Pacific region. (U.S. Air Force photo by Yasuo Osakabe)

Yokota Air Base, Japan --