Lichtenstein was an American artist best known for his brilliantly colored paintings in the style of large-scale comic strips, such as Whaam! and Drowning Girl. Originally an abstract expressionist, he turned to the New York-based pop art movement in the 1960s. In addition to his comic-book inspired panels, he created ironic pop art reinterpretations of famous paintings by artists such as Picasso. Which of his works was destroyed in the September 11, 2001, terrorist attacks? Discuss
Source: The Free Dictionary