Twenty-one Douglas DC-4 airliners were converted into car ferries as the ATL-98 Carvair, a major task that included replacing the aircraft's original forward fuselage with an extended version incorporating the flight-deck above the cargo hold and a side-hinged nose door through which five cars could be loaded, one at a time, by means of a mobile, ground-based " scissor " lift.

Twenty-one Americans were killed.

Twenty-one of the MiG-29s were sold to the United States in October 1997 to prevent their sale on the world market, and for research purposes.

Twenty-one people died and thousands were injured during the 19 days of protests.

* June 30 – Twenty-one students were killed and more than a hundred were injured when an American North American F-100 Super SabreF-100 jet crashed into Miamori Elementary School on the island of Okinawa.

Twenty-one children from the Alton area were drowned, and 49 were injured.

Twenty-one half-hour episodes were produced by Ruby-Spears Productions, an animation house formed by former Hanna-Barbera head writers Joe Ruby and Ken Spears, from October 1980 to September 1982, when the show went off the air.

Twenty-one percent of all households were made up of individuals and 9. 30 percent had someone living alone who was 65 years of age or older.

Twenty-one of the union guerrillas were captured and several others were wounded and killed.

* Spearmint tea: Twenty-one female hirsute patients, 12 with polycystic ovary syndrome and 9 with idiopathic hirsutism were included to the study in which they drank one cup of spearmint tea a day for 5 days, after which there was significant decrease in free testosterone and increase in luteinizing hormone, follicle-stimulating hormone and estradiol

Twenty-one children from the Alton area drowned, and forty-nine were injured.

Twenty-one schools, mainly schools providing reserve officers during the World Wars, were awarded the Légion d ' honneur.

Twenty-one diorama paintings were exhibited in the first eight years.

Twenty-one teenagers from Safed on a class trip were murdered in the attack.

Twenty-one people were killed and 51 injured.

Twenty-one passengers were found with little or no clothing.

Twenty-one local college trustees were listed in Acts of Alabama, Eleventh Annual Session.

Twenty-one thousand such tablets were seized and destroyed by the U. S. Food and Drug Administration in 1958.

Twenty-one others were sentenced to death and executed, and 734 more were imprisoned.

Twenty-one interviews were cited, the " x -#" refers to the document number in this volume only.

Twenty-one acquired companies were in the metals business, including Wah Chang and Cast Products, and this led to the acquisition of firms producing industrial machines and machine tools.

* Actual footage from Trial of Twenty-one

* 27 August – Twenty-one rugby clubs in the north of England split from the Rugby Football Union over the issue of broken time payments and form the Northern Rugby Football Union, which is the forerunner of the Rugby Football League.

* The Book of the Bear: Being Twenty-one Tales newly Translated from the Russian ( 1926 ) with Jane Harrison, the pictures by Ray Garnett

Twenty-one of the holes remain unexcavated and no reliable dating material has been recovered from the other thirty-five.

Twenty-one were under 15 years old, and most were girls from Moorfields Charity School.

Their argument was subsequently enfolded into Wood ’ s The Power of Maps … Twenty-one years later, Wood and Fels have put the map back together again ‘ by replacing the whole idea of the map as a representation with that of the map as a system of propositions .’” “ The map is not a picture ,” Wood and Fels insist in this new book, “ It is an argument … everything about a map, from top to bottom, is an argument .”

Twenty-one councillors are elected by first-past-the-post voting in twenty-one wards, while the remaining twenty are chosen from party lists so that the total number of party representatives is proportional to the number of votes received.

* Twenty-one texts on dinosaur tracks from the coal mines of central Utah

Twenty-one panels make up the 16 ’ × 5 ’ Jesse Tree window, based on the twelfth century Jesse Tree from Chartres Cathedral.

Twenty-one of his albums reached the country top ten from 1964 to 1976.

Twenty-one passengers and crew from the Indian Pacific were airlifted by the Royal Flying Doctor Service to Kalgoorlie Hospital from the remote Coonana airstrip, from the crash site.

Twenty-one of them ( including fourteen from Australia ) were swept to their deaths in the worst disaster to hit the sport.

But in the summer of 1921, Zeth Höglund, together with Fredrik Ström and Hinke Bergegren, represented Sweden in the third congress of the Comintern held in Moscow, and Höglund worked hard to make the Swedish party accept the Twenty-one Conditions for membership in the Communist International, including changing the name from Sweden ’ s Social Democratic Left Party to the Swedish Communist Party.

In 1921, he opposed the adoption of the Twenty-one Conditions of the ComIntern, and was thus expelled from SSV.

Twenty-one are run by the government, while four are grant-aided ( managed by the Catholic Church and the United Church of Zambia with financial support from the government ).

Twenty-one other members of Charlie Company also testified on Calley's defense corroborating the orders.

Twenty-one members of the Continental Congress were graduates of the school, and nine signers of the Declaration of Independence were either alumni or trustees of the university.

Twenty-one members and associates, including Winter, were indicted by federal prosecutors in 1979.

Twenty-one members of the party turned back, but Lederer pushed on with Jackzetavon, one of his five Iroquoian-speaking Susquehannock guides.

Twenty-one sheets survived, a few of the stamps passed ( invalidly ) through the posts, and Rowland Hill used some to experiment with cancellation techniques.

Twenty-one musical instruments and thirty-eight different tones are used to play the Qaumi Tarana, the duration of which is 80 seconds.

Twenty-one is frequently used in physical education classes and by basketball team coaches as skill development.