The supreme quality for leadership is unquestionable integrity.

FORBES: Without It, No Real Success is Possible

He has impeccable law enforcement and national security credentials, a relentless commitment to the rule of law, unquestionable integrity and independence, and a steady hand that has guided the Bureau as it confronts our most serious threats.

WHITEHOUSE: The White House

"The integrity of my new economic team is unquestionable, " says the president.

CNN: Reinventing Estrada