The United States is investigating the leak of highly classified intelligence documents that describe Israel's preparations for a retaliatory strike on Iran. The documents, prepared by the National Geospatial-Intelligence Agency, were circulated on the Telegram messaging app and provide US interpretations of Israeli Air Force and Navy planning based on satellite imagery. House Speaker Mike Johnson confirmed that an investigation is underway. The leak has raised concerns, but US officials stated that it would not impact plans for an attack against Iran. Israel is taking the leak seriously, and the US has urged Israel not to strike Iran's nuclear or oil facilities.