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We have measured the nuclear transparency of the A(e,e' pi^+) process in^{2}H,^{12}C, ^{27}Al, ^{63}Cu and ^{197}Au targets. These measurements wereperformed at the Jefferson Laboratory over a four momentum transfer squaredrange Q^2 = 1.1 - 4.7 (GeV/c)^2. The nuclear transparency was extracted as thesuper-ratio of $(\sigma_A/\sigma_H)$ from data to a model ofpion-electroproduction from nuclei without pi-N final state interactions. TheQ^2 and atomic number dependence of the nuclear transparency both showdeviations from traditional nuclear physics expectations, and are consistentwith calculations that include the quantum chromodynamical phenomenon of colortransparency.

Measurement of Nuclear Transparency for the A(e,e' pi^+) Reaction