Trump is being hailed for his meeting with the North Korean leader.
Their signed commitment reaffirms an agreement struck between the leaders of North and South Korea.
"Kim who is known as a reasonable leader may have accepted his advisers' recommendations to prioritize safety in aviation", said Yang Moo-jin, a professor at Seoul's University of North Korean Studies.
Analysts called Trump's halting of military exercises a major concession to North Korea, especially since Kim made no concrete pledge on the process of denuclearisation but merely reaffirmed a vaguely worded promise he has given to South Korea before.
The vice president commended Trump on his success thus far with North Korea, speaking of that country's participation in the Winter Olympics, the suspension of all ballistic missile testing and, recently, the release of three American hostages. "I got that after we signed the agreement", the president told reporters.
This was seen by some analysts as a big victory for China, since Beijing had sought a "dual suspension" - or "freeze for freeze" - by which the United States and South Korea would freeze military exercises in exchange for the North suspending nuclear weapons testing.
Trump may be credited with creating a positive atmosphere around the talks in Singapore, where a day of bonhomie in front of the cameras contrasted sharply with last year's exchange of insults and threats with Kim that raised fears of war.
Panetta pointed to previous USA administrations that tried to negotiate with Pyongyang, but failed to make the deals stick.
But Trump refused to endorse a communique at the G7 summit over the weekend that said participants were "guided by our shared values of freedom, democracy, the rule of law and respect for human rights and our commitment to promote a rules-based global order".
Given his hawkish views, Bolton was described as a "human scum and a bloodsucker" by North Korea's propaganda outlets in 2003.
"The Singapore summit statement is essentially aspirational: no definitions of denuclearisation, no timelines, no details as to verification", Haass said on Twitter. What do neighbors China and Japan want? The talks ultimately imploded over differences on a verification regime, and North Korea formally withdrew from the negotiations after it launched a long-range rocket, prompting global outrage.
The U.S. has reportedly been calling for the regime to ship its nuclear weapons out of the country. One thing that surprised me is that there was nothing in the joint statement or comments about how to really move forward with reducing tensions and normalizing relations, such as setting up liaison offices in each other's' capitals or hotline between the two militaries and so on. He said it was a last minute deal and expected more than 6,000 Americans' remains to be brought back to the U.S.
Pentagon officials scrambled for a clear message on Tuesday about the U.S. military presence in South Korea, after President Donald Trump vowed at his summit with the North's leader Kim Jong Un to cancel "provocative" joint drills.
He emphasized, however, that the Trump administration is still working toward a final deal.
"It's a victory for North Korea, in having initiated an open-ended, drawn-out negotiation process that ensnares the USA into not enforcing sanctions", said Lee.