Earlier this year Central Park crowds looked on in horror as a hawk dug his talons into a squirrel. Now the pigeons of New York are being targeted as the city considers bringing in robotic hawks to perch on rooftops. Newsday reports that robo hawks could be a weapon for driving pigeons from city sidewalks; an idea brought in last year by Brooklyn Councilman Simcha Felder. Just how much will it take to rid the......