“Just landed – a long trip, but everybody can now feel much safer than the day I took office,” he tweeted on Wednesday.
“There is no longer a Nuclear Threat from North Korea. Meeting with Kim Jong Un was an interesting and very positive experience. North Korea has great potential for the future!”
The summit was the first between a sitting US president and a North Korean leader and followed a flurry of North Korean nuclear and missile tests and angry exchanges between Trump and Kim last year that fuelled fears of war.
Independent experts say the North could have enough fissile material for anywhere between about a dozen and 60 nuclear bombs.
Last year it tested long-range missiles that could reach the US mainland, although it remains unclear if it has mastered the