Alan D. Bersin (born October 15, 1946) served as the acting Commissioner of U.S. Customs and Border Protection (CBP).
 Acting Commissioner Bersin was placed by President Barack Obama on March 27, 2010 as a recess appointment.
 As Acting Commissioner, Mr. Bersin oversaw the operations of CBP’s 57,000-employee work force and managed an operating budget of more than $11 billion.
 Bersin formerly served as the Department of Homeland Security Assistant Secretary for International Affairs and Special Representative for Border Affairs, informally known as the "Border Czar."
 Bersin currently serves as Assistant Secretary of International Affairs and Chief Diplomatic Officer for the Department of Homeland Security, a position he assumed on January 3, 2012.
 According to the Department of Homeland Security website, in this position Bersin "oversees the Department's international engagement and serves as the principal advisor to Secretary Janet Napolitano on all international affairs".
The National Terrorism Advisory System (NTAS) is a terrorism threat advisory scale used by the US Department of Homeland Security since April 26, 2011.
 The NTAS is the replacement for the often-criticized, color-coded Homeland Security Advisory System introduced by the George W. Bush administration in 2002.
 Janet Napolitano said that the color-coded system often presented "little practical information" to the public and that the NTAS will provide alerts "specific to the threat" with "a specified end date."
Daniel G. Knauss was the Acting United States Attorney for the District of Arizona.
 Knauss served in that position in 1993 until Janet Napolitano was appointed by President Bill Clinton as United States Attorney for the District of Arizona.
 Knauss also served in the same position in 2007, receiving an appointment from George W. Bush.
 As of 2007, Knauss has worked for 34 years as an assistant district attorney.
Janet Ann Napolitano ( ; born November 29, 1957) is an American politician, lawyer, and university administrator who served as the 21st Governor of Arizona from 2003 to 2009 and United States Secretary of Homeland Security from 2009 to 2013, under President Barack Obama.
 She has been president of the University of California system since September 2013, shortly after she resigned as Secretary of Homeland Security.
The United States Secretary of Homeland Security is the head of the United States Department of Homeland Security, the body concerned with protecting the U.S. and the safety of U.S. citizens.
 The secretary is a member of the President's Cabinet.
 The position was created by the Homeland Security Act following the attacks of September 11, 2001.
 The new department consisted primarily of components transferred from other cabinet departments because of their role in homeland security, such as the Coast Guard, the Federal Protective Service, U.S. Customs and Border Protection (which includes the Border Patrol), U.S. Immigration and Customs Enforcement (which includes Homeland Security Investigations), the Secret Service, and the Federal Emergency Management Agency (FEMA).
 It did not, however, include the FBI or the CIA.
Elaine Costanzo Duke (born 1958) is an American civil servant who is the current Acting United States Secretary of Homeland Security.
 On January 30, 2017, she was nominated by President Donald Trump to become the United States Deputy Secretary of Homeland Security under John F. Kelly.
 She became acting Secretary of Homeland Security on July 31, 2017, when John F. Kelly assumed the office of White House Chief of Staff.
House v. Napolitano (D. Mass., 2012) is a United States District Court for the District of Massachusetts case involving David House, a known supporter of Chelsea Manning and co-founder of the Manning Support Network, who brought action against Janet Napolitano, Secretary of the United States Department of Homeland Security(DHS), Alan Bersin, Commissioner of the U.S. Customs and Border Protection(CBP), and John T. Morton, Director of the U.S. Immigration and Customs Enforcement(ICE) (collectively referred to as "Defendants") for the search and seizure of his electronic devices by federal agents at the border.
 Defendants moved to dismiss, and the court denied the motion on First Amendment and Fourth Amendment grounds.
 House subsequently reached a settlement with the government in May 2013, to return or destroy all information obtained from the investigation.
Rand Beers (born November 30, 1942) is an American government official who served as Deputy Homeland Security Advisor to the President of the United States during the Barack Obama administration.
 He also served as acting Secretary of Homeland Security following the resignation of Secretary Janet Napolitano on September 6, 2013 until Jeh Johnson assumed that office on December 23, 2013.
Janice Kay Brewer (born September 26, 1944) is an American politician and author who served as the 22nd Governor of the U.S. state of Arizona, from 2009 to 2015.
 A member of the Republican Party, Brewer is the fourth woman, and third consecutive woman, to serve as Governor of Arizona.
 Brewer previously served as Secretary of State of Arizona from January 2003 to January 2009, when Governor Janet Napolitano resigned after being selected as Secretary of Homeland Security.
 Brewer became Governor of Arizona as part of the line of succession, as determined by the Arizona Constitution.
Marco Antonio Lopez (born April 7, 1978) is an Arizona politician.
 He has served in both elected and non-elected public offices, including Mayor of Nogales, Arizona, Executive Director of the Arizona-Mexico Commission, Policy Adviser to Governor Janet Napolitano for Mexico and Latin America, and Senior Adviser for International Affairs to the Governor.
 Born in Nogales, Sonora, Mexico, and raised in Nogales, Arizona, United States, he graduated from the University of Arizona.
 Lopez served at the Arizona State Capitol as Director of the Arizona Department of Commerce appointed by Arizona Governor Janet Napolitano.
 With the Homeland Security Nomination made for Napolitano.
 Lopez was appointed to serve as the Chief of Staff for United Customs and Border Protection.

Question: Who has served as Acting United States Attorney for the District of Arizona and as United States Secretary of Homeland Security in their lifetime, Daniel G. Knauss or Janet Napolitano?
Answer: Janet Napolitano