Benjamin Chertoff is a journalist, photographer and video producer.
 He is most known for his work on the Popular Mechanics article .
 He also created the Popular Mechanics Show, the weekly podcast of Popular Mechanics magazine.
 He is currently a freelance photojournalist, writer and documentary producer.
Sojourners magazine is a progressive monthly publication of the American Christian social justice organization Sojourners, which arose out of the Sojourners Community.
 It was first published in 1971 under the original title of "The Post-American".
 The magazine publishes editorials and articles on Christianity and politics, the church and social issues, social justice, and Christian living.
 Articles frequently feature coverage of fair trade, interfaith dialogue, peacemaking, and work to alleviate poverty.
 The offices of the magazine are in Washington, D.C.
Atlas Press Co. was a tool company that manufactured popular brands of metalworking tools from 1920 to the mid-1970s.
 Many of their products received wide coverage in "Popular Mechanics" and "Popular Science" at the time.
SpaceCub was a design project for a homebuilt rocket.
 Between 1993 and 1994, Geoffrey A. Landis proposed that a vehicle designed to launch to the edge of space might be a feasible project for a "personal" spaceship, the equivalent of a Piper Cub for space.
 The insight was that a flight to "only" 100 km would reach the officially-defined edge of space, and even though this is much easier a challenge than an orbital flight, such a suborbital flight would be of excitement to the public, and the pilot would be officially qualified as an astronaut.
 A small group of rocket enthusiasts, computer hobbyists, and science-fiction writers gathered together to do a preliminary design, with the ultimate goal of moving on to building a prototype, with (then) physics student David Burkhead leading the technical effort.
 The vehicle design was discussed in many venues, and presentations on the design progress were given in several conferences, such as the 1995NSS International Space Development Conference, where it attracted considerable popular attention.
 The design was featured in print in places including the December 1994 Popular Mechanics, and the Brazilian popular magazine Istoé.
Popular Mechanics is a classic magazine of popular science and technology.
Michael Belfiore is an author and journalist.
 Some of his notable works include "", published by Smithsonian Books "Rocketeers", and "The Way People Live - Life Aboard a Space Station".
 He has written numerous articles for "Popular Mechanics" and "Popular Science"
Mechanix Illustrated was an American magazine founded in the first half of the 20th century to compete against the older "Popular Science" and "Popular Mechanics".
 Billed as "The How-To-Do Magazine," "Mechanix Illustrated" ("MI") aimed to guide readers through various projects from home improvements and advice on repairs to "build-your-own (sports car, telescope, helicopter, etc)."
 It was headquartered in New York City.
The Parker Jeanie's Teenie, or JT-1, is a single-seat, single-engine sport aircraft first built in the United States in 1967 and marketed for homebuilding.
 It was featured on the cover of a Popular Mechanics magazine issue in May, 1968.
 The caption on the cover read, "Build This 'Flying Volkswagen' For Less Than $600!
."
 The cost of materials has increased since the article's publication but the initial popularity of Parker's Jeanie's Teenie was high.
 The Teenie would be certified in the Experimental category in the US.
 A pilot license is required to fly one, as it is not considered an ultralight aircraft in the United States.
Popular Mechanics for Kids (sometimes abbreviated to PMK) is an educational Canadian television series based on "Popular Mechanics" magazine.
 It was notable for starting the careers of Elisha Cuthbert, Jay Baruchel and Tyler Kyte.
 The show's intent is to teach viewers how things work.
 It was awarded the Parents Choice Award in 2003, and was nominated for the Gemini Awards.
William Gurstelle (born March 29, 1956) is an American nonfiction author, magazine writer, and inventor.
 He is a feature columnist for "Make" magazine and a columnist and contributing editor at "Popular Science" magazine.
 Previously, he was the Pyrotechnics and Ballistics Editor at "Popular Mechanics" magazine.

Question: What type of publication is Popular Mechanics and Sojourners?
Answer: magazine