FILE - In this Oct. 23, 2000, file photo, North Korean Leader Kim Jong Il, left, shakes hands with U.S. Secretary of State Madeleine Albright at the Pae Kha Hawon Guest House in Pyongyang. U.S. President Donald Trump could become the first sitting U.S. president to visit North Korea if plans for a summit with Kim Jong Un hold. But other prominent American political figures have visited Pyongyang in the past, many with a similar goal of trying to stop its nuclear program. Albright is the highest-level U.S. official to visit North Korea while in office (AP Photo/David Guttenfelder, Pool, File)
Kim Jong-il met US Secretary of State Madeleine Albright in Pyongyang in 2000. David Guttenfelder / AP Photo

Donald Trump's summit with Kim Jong-un could be a game-changing encounter