Wednesday, July 15, 1998 Published at 06:16 GMT 07:16 UK
Clinton's bodyguards face quiz
Cockell (left) faces questioning
Our Washington correspondent, Stephen Sackur, reports on the latest twist in the Clinton sex allegations scandal:
Kenneth Starr, the special prosecutor investigating allegations of sex and cover-up in the White House, has intensified the legal pressure on President Clinton.
As head of Mr Clinton's security detail, Special Agent Larry Cockell rides in the president's car and is privy to sensitive information, and that is why Kenneth Starr believes he may be able to provide crucial information about Mr Clinton's relationship with Monica Lewinsky.
That is in addition to two other agents who have already been summoned to appear by Mr Starr.
In short, he is trying to intensify the pressure on the president, but his efforts are unlikely to bear fruit this week.
The Justice Department is appealing against earlier court rulings that agents should testify under oath.
Officials claim agents will be unable to protect the president effectively if the relationship of trust between protector and protectee is breached and that is an argument which may well end up in the Supreme Court.