During his summit with North Korean dictator Kim Jong Un, President Trump is staying a few miles from the notorious Vietnam War prison known as the “Hanoi Hilton” — in significantly plusher digs. Trump and his White House entourage are quartered at the five-star J.W. Marriott Hanoi, which bills itself as “a world unto itself,” featuring seven on-site restaurants, a jazz club, a spa, and an indoor pool.