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  2. YF-20 - Wikipedia

    en.wikipedia.org/wiki/YF-20

    The YF-20 is a Chinese liquid-fuel rocket engine burning N 2 O 4 and UDMH in a gas generator cycle. It is a basic engine which when mounted in a four engine module forms the YF-21 . The high altitude variation is known as the YF-22 is normally paired with the YF-23 vernier to form the YF-24 propulsion module for second stages.

  3. List of yard and district craft of the United States Navy

    en.wikipedia.org/wiki/List_of_yard_and_district...

    All specially-built yard net tenders were reclassified in 1944 as auxiliary net laying ships, see List of auxiliaries of the United States Navy § Net laying ships (AN) for the reclassification result. The 24 impressed tugboats were reclassed as Net tender tugs (YNT), later some as tugboats (YTB or YTL).

  4. Lockheed YF-22 - Wikipedia

    en.wikipedia.org/wiki/Lockheed_YF-22

    The Lockheed/ Boeing/ General Dynamics YF-22 is an American single-seat, twin-engine, stealth fighter technology demonstrator prototype designed for the United States Air Force (USAF). The design team, with Lockheed as the prime contractor, was a finalist in the USAF's Advanced Tactical Fighter (ATF) competition, and two prototypes were built ...

  5. Wikipedia:WikiProject Military history/Assessment/Lockheed YF ...

    en.wikipedia.org/.../Assessment/Lockheed_YF-22

    File:An air-to-air overhead view of the YF-22 advanced tactical fighter aircraft during a test flight DF-ST-92-09938.jpg - DOD image - PD in the United States - okay; File:F-22 RFI.jpg - USAF image - a source would be nice

  6. 13 versions of the US flag you've probably never seen - AOL

    www.aol.com/news/2016-08-30-13-versions-american...

    The flag is also a symbol of exploration. It was planted on the moon during the first landing by Apollo 11 astronauts in 1969. The flag even has its own day -- each year Americans celebrate flag ...

  7. The Pride flag flies outside the White House in Washington, D.C. in June 2023. Secretary of State Marco Rubio has directed only the U.S. flag be flown outside of U.S. facilities (AFP via Getty Images)