A review of the current experimental situation will be given with
emphasis on recent results obtained at CERN. The speaker will argue that
the availability of high energy kaon beams at CERN allows one to make
incisive tests of the Standard Model. In particular the NA48
Collaboration has studied the possibility to measure the reaction
K+-->pi+ nu nubar leading to a ~10% precision on the knowledge of the
|Vtd| CKM parameter. Prospects to study of the CP-Vioating decays KL-->
pi0 e+e- (mu+mu-) and KL--> pi0 nu nubar will also be briefly described.