Leaving behind their pens and voice recorders, journalists switched roles yesterday to march in defence of press freedom. The "Free Speech, Free Hong Kong" protest was organised by the Hong Kong Journalists Association, which said 6,000 took part. Police put the figure at 1,600. "Such a big number of people illustrates that the public has started to feel that press freedom is at risk," association chairwoman Sham Yee-lan said.