Title: Wood.
Question: For modern solid wood doors, what wood is often used in addition to small-knotted pine or poplar?

Title: United States Air Force.
Question: What is one of the functions of the USAF?

Title: LaserDisc.
Question: What was the first consumer VLP player?

Title: Muammar Gaddafi.
Question:
What organization killed Gaddafi's grandsons?