The centers' 1994 guidelines for organ-donor screening, which are being revised, did not address the timing of screening tests.

WSJ: CDC Urges More HIV Tests Before Transplants

All of those systems are to be tested for Year 2000 problems before Dec. 31, but the FAA said the additional tests are necessary to ensure that the airports identify and address any unforeseen problems with date-sensitive airfield equipment and systems.

CNN: Airports resist new Y2K tests

The activists who trooped to London's Connaught Rooms on a wet Saturday applauded the traditionalist elements of David Cameron's address, such as the return of competitive school sport and a ban on calculators in primary school maths tests.

BBC: With the grassroots at Tory spring conference