BANGKOK, Nov. 20 -- An explosion at an anti-government protest site in central Bangkok early Thursday killed one man and wounded 23 others, prompting a leader of the demonstration to call for a mass rally against the government on Sunday. Police said they believe the explosion was caused by a grenade. It exploded about 3:30 a.m. at Government House, the prime minister's office complex that demonstrators have occupied since late August. The explosive landed on the canvas of a large marquee, showering those who were sleeping below with shrapnel. "It landed on ... (more)