TopRq.com

A POTD is an acronym for "Photo of the Day", "Picture of the Day", "Post of the Day" or "Poll of the Day". It is a term most commonly used by online digital photography communities as an honor to outstanding photos that are selected daily from among that community's membership. They can either be tagged as POTD or displayed in a special page on that site...

...

In military parlance, a gun is a muzzle or breech-loaded projectile-firing weapon. There are various definitions depending on the nation and branch of service. A "gun" may be distinguished from other firearms in being a crew served weapon such as a howitzer or mortar, as opposed to a small arm like a rifle or pistol, but there are exceptions, such as the USAF's GUU5/P. At one time, land based artillery tubes were called cannon and sea-based naval cannon were called guns...

Iron Man (Anthony Edward "Tony" Stark) is a fictional character, a superhero in the Marvel Comics Universe. The character first appeared in Tales of Suspense #39 (March 1963), and was created by writer-editor Stan Lee, scripter Larry Lieber, and artists Don Heck and Jack Kirby. A billionaire playboy, industrialist and ingenious engineer, Stark suffers a severe heart injury during a kidnapping in which his captors attempt to force him to build a weapon of mass destruction...

Aircraft are vehicles which are able to fly by being supported by the air, or in general, the atmosphere of a planet. An aircraft counters the force of gravity by using either static lift or by using the dynamic lift of an airfoil, or in a few cases the downward thrust from jet engines. Although rockets and missiles also travel through the atmosphere, most are not considered aircraft because they use rocket thrust instead of aerodynamics as the primary means of lift...