Which entity is this text about?

Ladda Tammy Duckworth (born March 12, 1968) is an American politician and retired U.S. Army Lieutenant Colonel, serving as the junior United States Senator for Illinois since 2017. A member of the Democratic Party, she earlier represented Illinois' 8th district for two terms (2013-2017) in the United States House of Representatives. Before election to office, she served as Assistant Secretary for Public and Intergovernmental Affairs in the United States Department of Veterans Affairs (2009-2011), and she was the Director of the Illinois Department of Veterans Affairs (2006-2009). In the 2016 election, Duckworth defeated incumbent Republican Senator Mark Kirk for the seat in the United States Senate.

Following in the footsteps of her father, who served in World War II, and ancestors who served in the Revolutionary War, Duckworth joined the Army Reserve Officers' Training Corps as a graduate student at George Washington University in 1990. She became a commissioned officer in the United States Army Reserve in 1992 and chose to fly helicopters because it was one of the few combat jobs open to women. As a member of the Army Reserve, she went to flight school, later transferring to the Army National Guard and entering the Illinois Army National Guard in 1996. Duckworth also worked as a staff supervisor at Rotary International headquarters in Evanston, Illinois.  Duckworth was working towards a Ph.D. in political science at Northern Illinois University, with research interests in the political economy and public health in southeast Asia, when she was deployed to Iraq in 2004. She lost her right leg near the hip and her left leg below the knee from injuries sustained on November 12, 2004, when the UH-60 Black Hawk helicopter she was co-piloting was hit by a rocket-propelled grenade fired by Iraqi insurgents. She was the first American female double amputee from the Iraq war. The explosion "almost completely destroyed her right arm, breaking it in three places and tearing tissue from the back side of it". The doctors "reset the bones in her arm and stitched the cuts" to save her arm. Duckworth received a Purple Heart on December 3 and was promoted to Major on December 21 at the Walter Reed Army Medical Center, where she was presented with an Air Medal and Army Commendation Medal. She retired from the Illinois Army National Guard in October 2014 as a lieutenant colonel. She returned to school and completed a PhD in Human Services at Capella University in March 2015.  The Daughters of the American Revolution erected a statue with Duckworth's likeness, and that of the Revolution's Molly Pitcher in Mount Vernon, Illinois, in 2011. The statue was erected in honor of female veterans.

Entity:
Tammy Duckworth