  Hard processes at the TeV scale exhibit enhanced (double log) EW corrections,
that need resummation in view of the high level of precision of Next Linear
Colliders. The fact that the weak sector is spontaneously broken causes some
peculiarities with respect to unbroken theories like QCD. For observables that
are exclusive with respect to $W,Z$ emission, some peculiar technical problems
have yet to be solved. Surprisingly, double logarithmic enhancements are
present even for inclusive observables like $e^+e^-\to$ hadrons, leading to
violation of the Bloch-Nordsieck theorem. The last effect is particularly
important, producing weak effects that in some cases compete in magnitude with
the strong ones.
