Australia flew into Pakistan Sunday for their first cricket tour in nearly a quarter of a century -- and into a high-security bubble that will envelop them throughout their six-week stay. Pakistan have struggled to attract visiting sides since a fatal terror attack on the visiting Sri Lanka team's bus in 2009. Australia pulled out of a tour five years earlier after a suicide blast at a Lahore church. They last played in Pakistan in 1998, winning the three-Test series 1-0 and blanking the hosts in the three one-day internationals. IMAGES