  The capability of the linear collider to discover and study the lightest
neutral pseudo-Nambu-Goldstone boson P_0 of dynamical symmetry breaking models
in the e+e- and gamma gamma modes is presented. For a number of technicolor
N_TC=4, the discovery of the P_0 at an e+e- collider via the reaction e+e- ->
gamma P_0 should be possible for an integrated luminosity of L=100 fb^-1 at
E=500 GeV as long as m_{P_0} is not near m_Z. In the gamma gamma collider mode
the gamma gamma -> P_0 -> b anti b signal should be very robust and could be
measured with high statistical accuracy for a broad range of m_{P_0} if N_TC=4.
