Tracey Hair was at the Margaret Chase Smith Federal Building in Bangor preparing to take the oath of citizenship March 15 when she heard that a fellow native Australian had massacred 50 people at prayer at two Christchurch, New Zealand, mosques. Hair, who lives in Bucksport, was one of more than 150 people who attended a vigil Friday afternoon at the Islamic Center of Maine in Orono to remember the lives lost when a 28-year-old lone gunman opened fire in what has been described as a right-wing terrorist attack. “I’m deeply sorry for the actions of a fellow countryman,” a tearful Hair said.