U.S. President Barack Obama vowed on Monday to pursue further nuclear arms cuts with Russia, urged China to follow suit and issued stern warnings to North Korea and Iran in their nuclear standoffs with the West.
Acknowledging the United States has more warheads than necessary, Obama held out the prospect of new reductions in the U.S. arsenal as he sought to rally world leaders for additional concrete steps against the threat of nuclear terrorism.
“We can already say with confidence that we have more nuclear weapons than we need,” Obama told students at South Korea’s Hankuk University a few hours before a global nuclear security summit opened in Seoul.
Read more: Obama vows more nuclear cuts with Russia

