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If you have trouble reading this message, view it in a browser. Ready to join? You love the Popular Mechanics newsletter, but we want to make sure you aren't missing out on more ways to dive deeper into the topics you love!   Join Pop Mech Pro today and you'll get unlimited access to every online story, plus an annual print subscription, deals from brands we love, exclusive plans for your next DIY projects, and a ton more awesome stuff.   Become a member to check out the exclusive Pop Mech Pro benefits and members-only stories below! Just $40 Your Pop Mech Pro Membership Benefits Include Unlimited access to site content Annual print subscription Members-only weekly newsletter Deals that improve your life Just $40 The First B-21 Raider Is Being Tested at a Top-Secret Air Force Manufacturing Plant The testing will pave the way for a first flight later this year. Read More Every Single Weapon Europe Is Sending to Ukraine (So Far) Tanks and aircraft-killing weapons top the list. Read More Black Holes Are Proof We're Living in a Holographic Universe This is how a black hole can exist in both two dimensions and three dimensions at the same time. Read More Ready to go Pro? Go down a rabbit hole on your favorite topic, from space to military to DIY and more. Join Now Follow Us Unsubscribe Privacy Notice PopularMechanics.com ©2022 Hearst Communications Inc. All Rights Reserved. Hearst Email Privacy, 300 W 57th St., Fl. 19 (sta 1-1), New York, NY 10019