Thai activists set fire a protest placard that represents the treaty between Siam (old name of Thailand) and France during a rally against the act of Cambodian Prime Minister Hun Sen toward Thailand outside the Cambodian Embassy in Bangkok, Thailand Tuesday, Oct. 27, 2009. Hun Sen offered to make Thailand's ousted Prime Minister Thaksin Shinawatra his economic adviser last week, threatening to worsen already tense relations between the two Southeast Asian neighbors.