Sam Rainsy greets supporters

Cambodian National Rescue Party President Sam Rainsy shakes the hands of supporters Friday after delivering a speech at Freedom Park in Phnom Penh. (Lauren Crothers/The Cambodia Daily)

Cambodian opposition leader of the Cambodia National Rescue Party (CNRP) Sam Rainsy greets his supporters along a street in Phnom Penh on July 19, 2013. Mr Rainsy returned from a self-imposed exile on Friday to spearhead his party's election campaign against well-entrenched Prime Minister Hun Sen. -- PHOTO: AFP

Cambodian opposition leader of the Cambodia National Rescue Party (CNRP) Sam Rainsy (centre right) raises his arm with Kem Sokha (centre left), vice-president of CNRP, as they greet supporters along a street in Phnom Penh on July 19, 2013. Thousands of cheering supporters greeted Mr Rainsy as he returned from self-imposed exile on Friday to spearhead his party's election campaign against well-entrenched Prime Minister Hun Sen. -- PHOTO: AFP

Cambodian opposition leader of the Cambodia National Rescue Party (CNRP) Sam Rainsy (top centre) and Kem Sokha (top left), vice-president of the CNRP, greet their supporters along a street in Phnom Penh on July 19, 2013. Thousands of cheering supporters greeted Mr Rainsy as he returned from self-imposed exile on Friday to spearhead his party's election campaign against well-entrenched Prime Minister Hun Sen. -- PHOTO: AFP