MAE SAKOEP, Thailand (AP) — Thai soldiers began sending back some of the thousands of people who have fled a series of airstrikes by the military in neighboring Myanmar, people familiar with the matter said Monday. But Thai officials denied that as the insecurity on the border added a new dimension to an already volatile crisis set off by a coup in Myanmar. The weekend strikes, which sent ethnic Karen people seeking safety in Thailand, represented another escalation in the violent crackdown by Myanmar’s junta on protests of its Feb. 1 takeover. On Saturday, ( more than 100 people were...