On 6 September 2007, Israeli jet fighters carried out Operation Orchard against a suspected nuclear reactor under construction by North Korean technicians.
In July that year, it was reported that between 15 and 20 North Korean technicians were working at the Monkey Point naval base in Rangoon.
But some weeks, the electricity fails a couple of times, and it is difficult to induce young Korean technicians to spend more than a month or two in a Chinese town.
A few scuffles broke out, but the Americans were quickly hustled out and replaced by Korean technicians.
A Burmese officer said he had witnessed North Korean technicians helping to construct an underground facility in foothills more than 300 miles (480 km) northwest of Rangoon.
And South Korean technicians are in the North surveying a site for a power reactor that Pyongyang at first refused to let the South supply.
A retired Pakistani military officer said this week North Korean technicians worked at Dr. Khan's lab in 1998.
Pakistan conducted its first test of the Ghauri missile amid great fanfare on April 6, 1998, with North Korean technicians reportedly looking on.
We must maintain humanitarian aid and continue the training of North Korean technicians in Europe if only to take this opportunity.
The International Atomic Energy Agency said North Korean technicians had removed the seals after having removed electronic devices for monitoring activities at the reactor.