Mojtaba Khamenei vows revenge for slain father, says it 'must certainly' happenIran's Supreme Leader Ayatollah Mojtaba Khamenei said on Saturday that avenging his slain predecessor and father was "the demand of the nation" and "must certainly" take place, according to a written message published on his official Telegram account."We pledge to avenge ‌the blood of the martyred leader and all the ⁠martyrs of these two wars from the criminal and disgraced killers," Khamenei said in the message.Khamenei issued the message on the occasion of funeral ceremonies for his father, Ayatollah Ali Khamenei, held months after he was killed in the US-Israeli airstrikes on February 28.Following Ayatollah Ali Khamenei's funeral ceremonies in Iran and Iraq, the Islamic Revolutionary Guard Corps (IRGC) issued