In Pictures: Police in Australia thwart terror plot to bring down plane

Passengers go through a security check before walking to departure gates at the Sydney Airport Domestic terminal in Australia, July 30, 2017. REUTERS/David Gray

Australian Federal Police officers talk with passengers near the check-in counters at the Sydney Airport Domestic terminal in Australia, July 30, 2017. REUTERS/David Gray

Passengers sit with their luggage near the check-in counters at the Sydney Airport Domestic terminal in Australia, July 30, 2017. REUTERS/David Gray

Australian Federal Police officers stand near the check-in counters at the Sydney Airport Domestic terminal in Australia, July 30, 2017. REUTERS/David Gray

Australian Federal Police officers talk with passengers near the check-in counters at the Sydney Airport Domestic terminal in Australia, July 30, 2017. REUTERS/David Gray

Police stand on a street that has been blocked to the public after Australian counter-terrorism police arrested four people in raids late on Saturday across several Sydney suburbs in Australia, July 29, 2017. REUTERS/David Gray

Police tape can be seen attached to the front fence of a home being searched after Australian counter-terrorism police arrested four people in raids late on Saturday across several Sydney suburbs in Australia, July 30, 2017. REUTERS/David Gray

Police officers block a small alley where police vans are parked at a home being searched after Australian counter-terrorism police arrested four people in raids late on Saturday across several Sydney suburbs in Australia, July 30, 2017. REUTERS/David Gray

Police officers watch a woman as she enters her home located next to a residence being searched after Australian counter-terrorism police arrested four people in raids late on Saturday across several Sydney suburbs in Australia, July 30, 2017. REUTERS/David Gray

A police officer wearing protective gear talks to fellow officers as he stands in the doorway of a home after Australian counter-terrorism police arrested four people in raids late on Saturday across several Sydney suburbs in Australia, July 30, 2017. REUTERS/David Gray

A police officer wearing protective gear stands in the doorway of a home after Australian counter-terrorism police arrested four people in raids late on Saturday across several Sydney suburbs in Australia, July 30, 2017. REUTERS/David Gray

Australian Federal Police and NSW Police officers work in the Surry Hills suburb of Sydney, Australia on Saturday, July 29, 2017. (Sam Mooy/AAP Image via AP)

July 30 2017 8:12 AM