Top Cambodian opposition leader Kem Sokha was taken in a convoy of police cars from his house to a court where he appealed against his 27-year treason sentence for trying to topple former premier Hun Sen's government. A court in March last year found Kem Sokha, a co-founder of the opposition Cambodia National Rescue Party (CNRP), guilty of conspiring with foreign entities to overthrow Hun Sen's government. IMAGES AND SOUNDBITES