The defense sector is experiencing significant growth driven by geopolitical tensions and increased government spending. Lockheed Martin (LMT) is identified as a prime beneficiary due to its largest contractor status, involvement in the 'Golden Dome' project, and a strong backlog. Despite recent dips, LMT's performance and its peers' significant gains suggest a bullish outlook. However, potential risks include budget cuts, the ban on buybacks impacting investor sentiment, and the unproven nature of new defense technologies. Broader exposure can be gained through ETFs like ITA and XAR. Investors should monitor these trends and manage their risk exposure.