The AGM-136A Tacit Rainbow was a United States military anti-radiation missile program run from 1982 to 1991.

The requirement was for a low-cost air-launchable system to aid in the destruction of enemy air defense networks.

The missiles would fly in advance of crewed aircraft up to 450 km (280 mi) to pre-programmed target zones and patrol there until enemy radar sources were detected which would then be destroyed, acting as a loitering munition.

Power was provided by a Williams F121 turbofan, producing 310 N (70 lbf) of thrust from the 0.9 m (35 in), 22 kg (49 lb) unit.

[citation needed] The Naval Research Advisory Committee reported in 1989 that the project was not progressing well.