Thailand's ruling military junta marked the third anniversary of its 2014 coup on May 22. But a series of recent small bombings in Bangkok proves that the underlying sources of instability in Thailand have not been reconciled under military rule. The latest blast in Bangkok occurred May 22 inside a military-run hospital in the central part of the city, injuring at least 21 people. According to Bangkok police, a timer-activated pipe bomb packed with nails was hidden inside a vase in a waiting room where a number of retired senior military officers were awaiting treatment. No one has claimed responsibility for the attack, but a government spokesman blamed opposition elements attempting to discredit the junta. The incident itself was relatively minor; the device did not appear to be designed to cause major damage to the building, and few of the injuries are believed to be serious.