High E$_T$ jets and double scattering
  The recently found excess of high E$_T$ jets over current QCD predictions is attributed to gluon radiation at double scattering process inside a nucleon. The order of magnitude estimate of the cross section fits experimental findings rather well. The specific features of the process are discussed. Various similar hadronic effects related to the short radiation length are described. 
I.M.Dremin ( P.N.Lebedev Physical Institute, Moscow, Russia )