Atty. Gen. Claudia Paz y Paz is fighting gang leaders, corrupt officials, Mexican drug cartels and figures from the 1961-1996 civil war, including a notorious former president.GUATEMALA CITY — She holds one of the most dangerous jobs in this spectacularly dangerous country, confronting the most feared and powerful men of the Guatemalan present: gang leaders; dirty public officials; shot-callers in the Mexican drug cartels who have bled in from the north.