The regime is worried. They have sensed that after the failure of useless negotiations on the nuclear issues, the Israelis or Americans are prepared to take military action against the regime's nukes. The new regular Iranian air force commander is also a surprise to many. He is not one of those individuals who was recruited and trained during the Shah's reign in 1970s. About 100% of the Iranian air force personnel from 1960-70s were trained either inside the US or by the American advisers in the country. The new commander is a regime loyalist and it shows that the Mullahs want loyal commanders who would fight for them in case of a foreign military strike. They never trusted the personnel who were trained and hired by the Shah's army before the Islamic revolution. Now the regime for the first time since the revolution of 1979 has a commander who joined the force in 1982, groomed and probably brainwashed by the new establishment, trusted/confirmed by the Islamic Political & Idealogical Office of the armed forces and now could be completely relied upon in emergencies.
The Iranian regime is now worried more than ever.