Definition: In this task, you will be presented with a passage and have to answer a question based on your understanding of the events inferred from the passage. Try to find the best answer that is most likely to fill in "_". Note that the URLs in the text have been replaced with [Link].
Input: Three missing Bradford sisters who are believed to have fled to Syria to join ISIS with their nine children had been stopped from leaving the UK three months ago, it has emerged. Khadija, Sugra and Zohra Dawood and their nine children - all of whom are now feared to be in the hands of the terror group - were taken off a flight bound for Saudi Arabia in March. According to anti terror police, the group were put through security checks at Manchester airport which caused them to miss their flight. But they were subsequently cleared to travel when security officials discovered they were travelling to a religious pilgrimage.Khadija, Sugra and Zohra Dawood were removed from flight bound for Saudi ArabiaThey were put through security checks but subsequently allowed to travelWest Yorkshire Police say one of Bradford mothers says she is in SyriaThree sisters and their 9 children believed to have gone to Islamic State 
 Question:The last photos of the missing families show them smiling happily at the airport before their trip to _.

Saudi Arabia