Iranians across the country are marking today the 31st anniversary of the takeover of the US embassy in Tehran by Iranian students. Thousands of Iranians gathered in front of the former US embassy building in Tehran to mark the day.According to Iranian channel PressTV, large crowd waved flags, carried banners and chanted slogans against the US and Israel.On 4th November, Iran annually marks the anniversary of the capture of the US embassy by Iranian students in Tehran in 1979, months after the Islamic revolution which toppled the US-backed shah.