The Charter of the [[United Nations]], in Article 2(4), prohibits the “threat or use of force against the territorial integrity or political independence” of a member state, and many observers have wondered whether the establishment of a no-fly zone would constitute a violation of this prohibition. The Congressional Research Services advised that a no-fly zone imposed against a state that has not carried out an attack on its neighbors may consider the imposition of a no-fly zone an “armed attack.” CRS warned that even if no-fly zone operations in a given state do not constitute an “armed attack", | The Charter of the [[United Nations]], in Article 2(4), prohibits the “threat or use of force against the territorial integrity or political independence” of a member state, and many observers have wondered whether the establishment of a no-fly zone would constitute a violation of this prohibition. The Congressional Research Services advised that a no-fly zone imposed against a state that has not carried out an attack on its neighbors may consider the imposition of a no-fly zone an “armed attack.” CRS warned that even if no-fly zone operations in a given state do not constitute an “armed attack", |