Boston ? Troopers arrested an MIT student at gunpoint Friday after she walked into Logan International Airport wearing a computer circuit board and wiring on her sweatshirt. Authorities call it a fake bomb; she called it art.

Star Simpson’s attorney said the charges against her were an overreaction, but authorities expressed amazement that someone would wear such a device eight months after a similar scare in Boston, and six years after two of the jets hijacked in the Sept. 11 attacks took off from Logan.

The terminal was not evacuated and flights were not affected, airport officials said.

Simpson, 19, of Lahaina, Hawaii, wore the white circuit board on her chest over a black hooded sweatshirt, Pare said at a news conference. The battery-powered rectangular device had nine flashing lights, and Simpson had Play-Doh in her hands, he said.