Photos: Michael Bloomberg

National Stage
As the mayor of one of the two cities that were the target of the 9/11 attackers, Bloomberg (seen here with President Obama at the 2008 memorial to the victims of the World Trade Center attack) has taken an active interest in combatting terror. Upon election, he set up a Counterrorism Bureau which works with the NYPD intelligence division to gather information about how terrorism all over the world might affect the city.