Thai security forces inspect the site of a grenade attack on a military base in Bangkok on March 15, 2010. The attack wounded two soldiers as tens of thousands of anti-government protesters massed at another barracks in the Thai capital, a military spokesman said. Four M-79 grenades exploded at the base in the center of the capital at 1:30 pm, injuring one soldier in the arm and the other in the stomach, army spokesman Colonel Sunsern Kaewkumnerd said. (Getty Images)

Thai security personnel investigate the site of a grenade attack at an army base in Bangkok March 15, 2010.