Domodedovo Airport has been the focus of two terrorist-related incidents. In 2004, Muslim suicide bombers managed to pass airport security, board two passenger planes, and carry out the bombings after departure from Domodedovo. Despite the heightened security measures taken after this incident, another suicide bomber attack occurred on 24 January 2011, when an Islamist militant entered the terminal building and detonated a bomb in the arrival hall. As a result, mandatory screening and pat-down practices have been introduced at the airport terminal entrances.