Coffee cups with one rose placed in each, with images of the two victims who died in the cafe siege, lawyer Katrina Dawson (L) and Lindt store manager Tori Johnson, at a makeshift memorial in Sydney, December 17, 2014. Tough new national security laws failed to prevent a deadly hostage crisis involving Iranian-born gunman Man Haron Monis in the heart of Sydney this week, Australian Prime Minister Tony Abbott said on Wednesday, raising questions about the usefulness of such measures. REUTERS/Jason Reed (AUSTRALIA - Tags: CRIME LAW SOCIETY)