That's How It Happened

"In days of conspiratorial work, somewhere on the 148th floor and using building site refuse they had tediously smuggled into the building under their pullovers, they constructed a functioning load-bearing balcony. In a long complicated process they scratched putty from the tall heavy window, which couldn't be opened. Then they extracted it using suction pads, shunted the balcony out, posed on it at 6 in the morning and had themselves photographed there from a helicopter for their nearest and dearest back home."