Logan Airport concourse evacuated for second time this week for security breach

BOSTON - The United Airlines concourse at Logan International Airport was evacuated Friday following a security breach. <br> <br> A man set off the walk-through metal detector, but because of an apparent shift change he wasn&#39;t immediately rescreened and left the checkpoint, sources told The Associated Press on condition they not be named. <br> <br> Federal security officials ordered the concourse in Terminal C cleared at about 8:50 a.m., the sources said. Logan spokesman Phil Orlandella said about 300 passengers and three flights were affected. <br> <br> The same concourse was evacuated on Tuesday after a maintenance employee mistakenly shut off the metal detector. <br> <br> On Thursday, a Delta Air Lines flight from Logan was aborted after a passenger with a history of mental illness demanded to be taken off the plane. <br> <br> The Transportation Security Administration took control of passenger screening around the nation on Feb. 17. <br> <br>