source:[1] RTX Stock: What to Know Before the U.S. Market Opens Monday, Dec. 15, 2025 - ts2.tech (https://ts2.tech/en/rtx-stock-what-to-know-be ...)[2] Defense & Aerospace Majors: US Stocks Week Ahead (Dec 15–19, 2025) — Boeing, Lockheed, RTX, Northrop, General Dynamics, L3Harris & HII in Focus (Updated Dec 14, 2025) - ts2.tech (https://ts2.tech/en/defense-aerospace-majors- ...)[3] Why the Arrow 3 sale to Germany matters- Opinion - The Jerusalem Post (https://www.jpost.com/defense-and-tech/articl ...)