In a heated session of the Greek Parliament, a preliminary investigative committee on the Tempi train collision voted to summon former minister Christos Triantopoulos to testify, prompting a walkout by six opposition parties. Accusing the ruling New Democracy party of undermining the probe, opposition leaders decried the move as a constitutional violation and a cover-up, casting a shadow over the pursuit of justice in one of Greece’s deadliest rail disasters.