Thuy Vu:
A conservative American news site, and a Japanese news agency have revealed Iran's role in North Korea's most recent nuclear test. The site's called The World Tribune and is published by a former executive of the Washington Times. The Japanese news agency is Kyodo. Their stories caught the attention of South Korea's MBC.

Reporter:
"North Korea's nuke was bought and paid for by a key end-user: Iran."

This is what the World Tribune, an on-line newspaper specializing in international news reported, quoting a source in the intelligence service. It said its evidence is that Iran scientists were at North Korea's nuclear test ground and satellite communications equipment was set up there. On the 17th, Britain's Sunday Times pointed out that Iran's leading nuclear scientist, Mohsen Fakhrizadeh Mahabadi, observed North Korea's nuclear test. Kyodo News in Japan reported that Iran paid the North tens of millions dollars in return for observing the nuclear test. Korea and US are discussing an air surveillance method to prevent North Korea from getting the main components to enrich uranium. Korea and the US have focused on connections between North Korea and Iran, under which Iran has supplied money and ballistic missile technology, and North Korea was in charge of nuclear test.

John Kerry:
This is about proliferation. And this is also about Iran because they're linked.

Reporter:
South Korea and the US are discussing an air surveillance method to prevent North Korea from getting the main components to enrich uranium.