  Because of inevitable blind spots at high rapidity and low transverse
momentum, the process $\overline qq \rightarrow l^+ l^- \ l^{+} \nu$ provides a
surprisingly large background to the $W^+W^+ \rightarrow l^+ \nu \ l^+ \nu$
signal associated with strong $WW$ scattering. Previous calculations of the
total background are approximately doubled, and the estimate of the ``no-lose''
luminosity at the LHC to observe manifestations of the electroweak symmetry
breaking mechanism is increased to between $\sim 100$ and $\sim 140$ fb$^{-1}$.
