Asymmetric

...criminals do:

Boris Johnson, the new mayor of London, made fighting crime his top priority as he officially took over his new role.

“It is the job of me as Mayor to lead the fightback against it and that is what I want to do and I hope you will all join me in doing it,” he said after signing the declaration of acceptance as mayor.

Johnson, who triumphed over Ken Livingstone by six points in Thursday’s poll, said the “tragically self-destructive” behaviour of some of the city’s children was its number one issue...

...The formal signing ceremony at City Hall came just hours after a 15-year-old boy was found stabbed to death in a stairwell in south London, the latest incident in a wave of knife-crime among young people in the capital.