Singapore, Jun 12 (ANI): President of the United States of America (U.S.A) Donald Trump and North Korean leader Kim Jong Un shook hands as they met at their historic summit in Singapore on Tuesday. Both the leader shook hands after signing a joint document today. After signing the document the United States President said that the relationship with North Korea is going to be much different that it had been in the past. Trump said he will "absolutely" invite Kim to the White House. On the other hand North Korean leader said world will see a major change. Trump arrived in Singapore on Sunday for his historic on-again, off-again meeting with the North Korean leader, Kim Jong Un.