Geopolitical tensions remain excessively strained, and they don't seem poised to ease anytime soon. Investors attuned to this situation, moreover, are taking a closer look at defense stocks such as RTX (RTX 0.70%). But opinions regarding the advantages and disadvantages of picking up shares of RTX (formerly Raytheon Technologies) right now vary widely. To help make sense of the different viewpoints, two Fool.com contributors look at the bull and bear cases for buying RTX stock. RTX faces operational challen ...