ahead this hour on cnn newsroom. in its most aggressive move yet, the house january 6th committee officially serves former u.s. president donald trump with a subpoena for documents and testimony about the insurrection. russia s alleged use of iranian-made drones to attack ukraine has some western nations calling for an investigation on the suppliers. we ll tell you all about moscow s cooperation with tehran. also in iran, a teachers union is calling for a nationwide strike over the recent deaths and detention of students around the country, adding to what has been more than a month of women-led protests against iran s violent crackdown. former u.s. president donald trump has now been officially served with a subpoena to testify before the january 6th committee. in a series of high-profile hearings this year, the committee documented mr. trump s failed quest to overturn his election defeat, culminating in the violent and deadly attack on the u.s. capitol. the committee