R&D for photon collider mode should be performed simultaneously with that o
f e(+)e(-) mode of TESLA, etc. Final decision about the turn of different s
tages of linear colliders (LQ should be made only after first results from
the LHC. It can imagine even the opportunity that the photon collider mode
will start running before e(+)e(-) mode. (C) 2001 Elsevier Science B.V. All
rights reserved.