Photojournalism is a particular form of journalism (the collecting, editing, and presenting of news material for publication or broadcast) that employs images in order to tell a news story. It is now usually understood to refer only to still images, but in some cases the term also refers to video used in broadcast journalism. Photojournalism is distinguished from other close branches of photography (e.g., documentary photography, social documentary photography, street photography or celebrity photography) by complying with a rigid ethical framework which demands that the work be both honest and impartial whilst telling the story in strictly journalistic terms. Photojournalists create pictures that contribute to the news media, and help communities connect with one other. Photojournalists must be well informed and knowledgeable about events happening right outside their door. They deliver news in a creative format that is not only informative, but also entertaining. Photojournalism is a particular form of journalism (the collecting, editing, and presenting of news material for publication or broadcast) that employs images in order to tell a news story. It is now usually understood to refer only to still images, but in some cases the term also refers to video used in broadcast journalism. Photojournalism is distinguished from other close branches of photography (e.g., documentary photography, social documentary photography, street photography or celebrity photography) by complying with a rigid ethical framework which demands that the work be both honest and impartial whilst telling the story in strictly journalistic terms. Photojournalists create pictures that contribute to the news media, and help communities connect with one other. Photojournalists must be well informed and knowledgeable about events happening right outside their door. They deliver news in a creative format that is not only informative, but also entertaining. Like a writer, a photojournalist is a reporter, but he or she must often make decisions instantly and carry photographic equipment, often while exposed to significant obstacles (e.g., physical danger, weather, crowds, physical access). The practice of illustrating news stories with photographs was made possible by printing and photography innovations that occurred in the mid 19th century. Although early illustrations had appeared in newspapers, such as an illustration of the funeral of Lord Horatio Nelson in The Times (1806), the first weekly illustrated newspaper was the Illustrated London News, first printed in 1842. The illustrations were printed with the use of engravings. The first photograph to be used in illustration of a newspaper story was a depiction of barricades in Paris during the June Days uprising taken on 25 June 1848; the photo was published as an engraving in L'Illustration of 1–8 July 1848. During the Crimean War, the ILN pioneered the birth of early photojournalism by printing pictures of the war that had been taken by Roger Fenton. Fenton was the first official war photographer and his work included documenting the effects of the war on the troops, panoramas of the landscapes where the battles took place, model representations of the action, and portraits of commanders, which laid the groundwork for modern photojournalism. Other photographers of the war included William Simpson and Carol Szathmari. Similarly, the American Civil War photographs of Mathew Brady were engraved before publication in Harper's Weekly. Disaster, including train wrecks and city fires, was also a popular subject for illustrated newspapers in the early days. The printing of images in newspapers remained an isolated occurrence in this period. Photos were used to enhance the text rather than to act as a medium of information in its own right. This began to change with the work of one of the pioneers of photojournalism, John Thomson, in the late 1870s. In collaboration with the radical journalist Adolphe Smith, he began publishing a monthly magazine, Street Life in London, from 1876 to 1877. The project documented in photographs and text, the lives of the street people of London and established social documentary photography as a form of photojournalism. Instead of the images acting as a supplement to the text, he pioneered the use of printed photographs as the predominant medium for the imparting of information, successfully combining photography with the printed word. On March 4, 1880, The Daily Graphic (New York) published the first halftone (rather than engraved) reproduction of a news photograph. In March 1886, when General George Crook received word that the Apache leader Geronimo would negotiate surrender terms, photographer C. S. Fly took his equipment and attached himself to the military column. During the three days of negotiations, Fly took about 15 exposures on 8 by 10 inches (200 by 250 mm) glass negatives. His photos of Geronimo and the other free Apaches, taken on March 25 and 26, are the only known photographs taken of American Indians while still at war with the United States. Fly coolly posed his subjects, asking them to move and turn their heads and faces, to improve his composition. The popular publication Harper's Weekly published six of his images in their April 24, 1886 issue. In 1887, flash powder was invented, enabling journalists such as Jacob Riis to photograph informal subjects indoors, which led to the landmark work How the Other Half Lives. By 1897, it became possible to reproduce halftone photographs on printing presses running at full speed.