Petugas keamanan di Brisbane Convention & Exhibition Centre berjaga menjelang KTT G20, di Brisbane, Australia, 12 November 2014. Para pemimpin ekonomi dunia akan melakukan perjalanan ke Brisbane untuk KTT G20 Leadership pada 15-16 November. Glenn Hunt/Getty Images

Polisi memeriksa ID pengendara sepeda di dekat Brisbane Convention dan Exhibition Centre, di Brisbane, Australia, 12 November 2014. Daniel Munoz/Getty Images

Polisi memeriksa mobil yang memasuki Stamford Hotel, tempat delegasi Cina dan Italia menginap, di Brisbane, Australia, 12 November 2014. Glenn Hunt/Getty Images

Polisi berjaga di gerbang pintu masuk mobil Brisbane Convention and Exhibition Centre, di Brisbane, Australia, 12 November 2014. Daniel Munoz/Getty Images

Petugas Keamanan di Brisbane Convention & Exhibition Centre, memperketat keamanan menjelang KTT G20, di Brisbane, Australia, 12 November 2014. Glenn Hunt/Getty Images

Polisi berpatroli air menjelang KTT G20, di Brisbane, Australia, 12 November 2014. Glenn Hunt/Getty Images