  The 4He total photoabsorption cross section is calculated with the realistic
nucleon-nucleon potential Argonne V18 and the three-nucleon force (3NF) Urbana
IX. Final state interaction is included rigorously via the Lorentz Integral
Transform method. A rather pronounced giant resonance with peak cross sections
of 3 (3.2) mb is obtained with (without) 3NF. Above 50 MeV strong 3NF effects,
up to 35%, are present. Good agreement with experiment is found close to
threshold. A comparison in the giant resonance region is inconclusive, since
present data do not show a unique picture.
