  40 years after its introduction, the phenomenon of color transparency remains
a domain of controversial interpretations of experimental data. We review
present evidence for or against its manifestation in various exclusive hard
scattering reactions. The nuclear transparency experiments reveal whether short
distance processes dominate a scattering amplitude at some given kinematical
point. We plead for a new round of nuclear transparency measurements in a
variety of experimental set-ups, including near-forward exclusive reactions
related to generalized parton distribution (GPD) physics and near-backward
exclusive reactions related to transition distribution amplitudes (TDA)
physics.
