Sunday, May 23, 1999 Published at 23:19 GMT 00:19 UK
Nuclear spying warnings 'ignored'
Attention will focus on how badly compromised US secrets are
A senior US official says he told the White House three years ago of his concerns about Chinese nuclear spying, but his warnings went unheeded.
His remarks suggest the White House was told about Chinese espionage much earlier than it has acknowledged.
First public statement
Mr Trulock was one of the main witnesses for Congressman Chris Cox's report on Chinese espionage, which will be made public on Tuesday.
He said he was convinced there had been spying by the Chinese, which he put on a scale with attempts to steal the secret of the atomic bomb during World War II.
"I conclude in my personal view that the potential damage is very significant," he said.
Clinton denies knowledge
President Clinton said earlier this year that no-one had reported to him that there may have been espionage at America's laboratories during his time in office.
"What he was referring to - and this is what he said - was nothing at the nuclear weapons labs.
"There were compromises in the '90s - thefts of nuclear secrets - but we don't know whether it came from our labs."
BBC correspondent Rob Watson says the publication of the Congressional report on China's espionage efforts is certain to re-ignite the debate over just what the president knew and when, and over just how badly compromised America's nuclear secrets may be.