Ethnic group says Myanmar air attack kills 60 at celebrationBANGKOK (AP) — Air strikes by Myanmar’s military killed more than 60 people, including singers and musicians, attending an anniversary celebration of the Kachin ethnic minority’s main political organization, members of the group and a rescue worker said Monday.The number of casualties at Sunday night’s celebration by the Kachin Independence Organization in the northern state of Kachin appeared to be the most in a single air attack since the military seized power in February last year from the elected government of Aung San Suu Kyi.Sunday’s celebration of the 62nd anniversary of the founding of the Kachin Independence Organization, which included a concert, was held at a base also used for military training by the Kachin Independence Army, the KIO’s armed wing.Hpakant is the center of the world’s biggest and most lucrative jade mining industry, from which both the government and the rebels derive revenue.An emergency services rescue worker who was in Hpakant and also asked for anonymity said he saw three military aircraft making bombing runs over the celebration ground, just a few kilometers (miles) away."