Operation Eager Glacier
Operation Eager Glacier was a secret U.S. effort to spy on Iran with aircraft in 1987 and 1988. The information gathered became part of an intelligence exchange between U.S. military intelligence services and Iraq during the Iran–Iraq War.
Eager Glacier took place at the same time as other U.S. military operations in the Persian Gulf, including Operation Earnest Will, the naval escort of Kuwaiti-owned tankers; Operation Prime Chance, the secret attempt to prevent Iranian forces from attacking Gulf shipping; and Operation Praying Mantis, the retaliation for the mining of the U.S. guided-missile frigate USS Samuel B. Roberts.