(CNN) — Longtime White House journalist Helen Thomas has died at age 92, sources told CNN Saturday.

Thomas covered 10 presidents over nearly half a century, and became a legend in the industry.

She was a fixture at White House news conferences — sitting front and center late in her career — where she frequently exasperated government spokesmen with her pointed questions.

Senior White House Correspondent Helen Thomas reads the newspaper in the White House press room on August 2, 2006 in Washington. Senior White House Correspondent Helen Thomas reads the newspaper in the White House press room on August 2, 2006 in Washington. Thomas began covering the White House for United Press International when John F. Kennedy became president in 1961 and was a fixture there until her retirement in 2010.

She was a trailblazer and the considered the dean of the White House press corps because she was the longest-serving White House journalist.