'Mega'

Codename of an alleged Israeli spy in the US government.

The FBI has opened an investigation to determine whether a senior U.S. government official has been passing highly sensitive information to the Israeli government, according to sources with direct knowledge of the inquiry. The investigation was launched in January after the National Security Agency intercepted a secure communication between a senior Israeli intelligence officer in Washington and a superior in Tel Aviv that referred to someone code-named "Mega," and an attempt to obtain a sensitive American document, U.S. government officials said.