Title: Lighting.
Question: Would you consider aesthetic elements alone in architectural lighting design?

Title: Samurai.
Question: What clans were most regional clans' chiefs also a member of?

Title: Late Middle Ages.
Question: Which author popularized a pessimistic view of the Late Middle Ages in his 1919 book?

Title: Military history of the United States.
Question:
What is one prominent, specific terrorist group targeted by the War on Terrorism?