What is a ‘lone wolf’ terror attack?

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Hostages run out of a cafe in the central business district of Sydney on December 16, 2014. Police stormed the Sydney cafe where a gunman had taken hostages and displayed an Islamic flag, television footage showed early December 16. AFP PHOTO/Peter PARKS (Photo credit should read PETER PARKS/AFP/Getty Images)

The terror attack in Sydney this weekend could’ve been executed by a Lone Wolf, someone who isn’t directly involved with a terrorist cell.

How do these lone wolves operate?

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