Who was probably present during the summit?

Choices:
A. Korean professors
B. Secret Service
C. U.S. Governors
D. not enough information
Secret Service
SEOUL — The U.S. and South Korea remain united in pursing a diplomatic solution to end the North Korean nuclear threat, but their national security priorities may differ over what would be the role of the U.S. military in Korea after a denuclearization deal is reached.
“That is going to be the moment of truth, so to speak, when the United States and South Korea will have to agree on what kind of security alliance we want to maintain moving forword,” said Go Myong-Hyun, a North Korea analyst at the Asan Institute for Policy Studies in Seoul.
U.S. President Donald Trump on Friday revived the June 12 Singapore summit with North Korean leader Kim Jong Un, eight days after canceling it. Trump said he was convinced of Kim’s commitment to denuclearization by the renewed diplomatic talks that included a visit to Washington by Kim Yong Chol, the North’s former intelligence chief, who carried a letter from the North Korean leader.
South Korean President Moon Jae-in has been influential in facilitating the U.S.-North Korea summit, in getting Kim to agree to the broad goal of denuclearization, and in urging Trump to stay committed to the diplomatic process to resolve differences with North Korea.
President Trump seems to be leaning now towards Moon’s approach versus the more confrontational stance advocated by some of his security team in demanding that North Korea unilaterally and completely disarm before any concessions are granted.
Friday Trump downplayed expectations for a major breakthrough at the summit, saying it will be the beginning of a process. He also backed away from his “maximum pressure” approach that stressed tough sanctions and the threat of military force, focusing instead on brokering an agreement to end the North’s nuclear program for economic aid and security guarantees that could include a peace treaty to replace the armistice that ended the Korean War in 1953.
South Korean officials said there is possibility that Moon may join Trump in Singapore to help negotiate a nuclear deal with Kim, as the South Korean leader shares both Trump’s overall goals, and has developed a positive working relationship with his North Korean counterpart during their two previous summits.