  We propose a conceptually new framework to study the onset of Anderson
localization in disordered systems. The idea is to expose waves propagating in
a random scattering environment to a sequence of short dephasing pulses. The
system responds through coherence peaks forming at specific echo times, each
echo representing a particular process of quantum interference. We suggest a
concrete realization for cold gases, where quantum interferences are observed
in the momentum distribution of matter waves in a laser speckle potential. This
defines a challenging, but arguably realistic framework promising to yield
unprecedented insight into the mechanisms of Anderson localization.
