Could Turkish police have prevented the double-suicide attack Oct. 10 in Ankara that killed 102 people? Until April 13, we could only speculate. But now, we can give a firm answer that yes, the attack could have been thwarted.

This was the question asked immediately after the attack, because nobody had seen any police measures near the train station where the bombs went off. Those coming to the station, where a peace rally was being organized by labor unions and civil society organizations, were not searched by the police.

This question is vital because this Islamic State (IS) attack had a bearing on the fate of Turkey. Chaos and the threat of terror, which was forged by this bloodiest terror attack in Turkey’s history, played a role in the Justice and Development Party’s (AKP) victory in the Nov. 1 elections, after its resounding loss of votes in the June 7 general elections.

Thanks to stories in the daily newspaper Cumhuriyet by journalist Kemal Goktas published April 13 and April 14, we now know security forces had advance intelligence reports that IS was planning such attacks. The forces even had the names of the terrorists planning to carry them out. But not only did the police in Ankara fail to prevent the attacks, they actually facilitated the attacks with their ill-contrived actions.