Rivals for British PM take aim at Johnson

The six contenders vying to become Britain's next prime minister held a leadership hustings on Saturday with rival candidates aiming their fire at frontrunner Boris Johnson.The men battling for the leadership of the governing centre-right Conservative Party spoke at a central London hotel ahead of a week of voting that will whittle them down to two.The contenders were warming up their arguments ahead of a 90-minute televised debate on Sunday although Johnson is sitting it out, claiming direct bi