>> with an australian -- >> with an australian tinge. >> that's what we know. and we've also been told police know who they're dealing with, but they're not letting us know that. earlier we spoke with roger shanahan. he's a former australian army colonel. he's a middle east expert and a fellow at the middle east center for policy. he thinks the hostage taker chose his location for maximum international impact. here's his comments. >> it's going to be very difficult obviously to determine what the whole purpose of this was until we find out more about the hostage taker, but i think the fact that the cafe in question is directly opposite one of the major television stations in sydney, it's done right in nearly the dead center of australia's largest city in the central business district, all of these point to the fact that the person in question wanted maximum exposure not only nationally but internationally. and putting up that flag with