Anti-government protest leader Suthep Thaugsuban addresses supporters during a rally Friday, Jan. 17, 2014 in Bangkok. Dozens of people were wounded in Thailand's capital Friday when a grenade blast ripped through a crowd of marching anti-government demonstrators, an ominous development that raises tensions in the country's political crisis and the specter of more bloodshed to come. (AP Photo/Apichart Weerawong)