SYDNEY, AUSTRALIA - DECEMBER 15:  Members of the public stand in a moments silence during the Lindt Cafe siege one year anniversary at Martin Place on December 15, 2015 in Sydney, Australia. Today marks the first anniversary of the deaths Katrina Dawson and Tori Johnson, who were killed along with the gunman following a 17-hour siege at the cafe in 2014.  (Photo by Lisa Maree Williams - Pool/Getty Images)