There has been a worrying increase in the number of pilots being targted by laser attacks as they fly over the capital.
The Met Police have released images of a blinding flash caused by a blue laser beam shone directly at a pilot during the Olympic Games.
But new kit is allowing the police to fight back, as Ronke Phillips now reports.
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Scotland Yard said two murder investigations have been launched following the separate incidents, which both happened in the past week.
Photos show the extraordinary surgical procedures to remove the growth.
The Met Police says 143 firearms have been handed in at stations across the capital in just seven days, including two antique machine guns.