surveillance balloon
1Surveillance aircraft — A Raytheon Sentinel of the RAF showing its radar pod. A surveillance aircraft is an aircraft used for surveillance collecting information over time. They are operated by military forces and other government agencies in roles such as intelligence… …
2Moored balloon — Moored balloons can carry instruments and sensors for long durations that are impractical for other aircraft …
3Observation balloon — An observation balloon being launched from the USS Arizona. This balloon has a two man crew that performed artillery spotting in support of the battleship s main guns …
4observation balloon — /ɒbzəˈveɪʃən bəlun/ (say obzuh vayshuhn buhloohn) noun a large gas filled balloon used to carry a crew of observers, especially one used in wartime for military surveillance, usually moored to the ground or to a ship …
5Roswell UFO Incident — The Roswell Incident involved the recovery of materials near Roswell, New Mexico, USA, on July 7, 1947, which has become the subject of intense speculation, rumor and questioning. There are widely divergent views on what actually happened and… …
6Health and Disease — ▪ 2009 Introduction Food and Drug Safety. In 2008 the contamination of infant formula and related dairy products with melamine in China led to widespread health problems in children, including urinary problems and possible renal tube… …
7Airship — For other uses, see Airship (disambiguation). Dirigible redirects here. For the 1931 film, see Dirigible (film). Not to be confused with Balloon (aircraft) or Blimp. Airship …
8aerospace industry — Introduction assemblage of manufacturing concerns that deal with vehicular flight within and beyond the Earth s atmosphere. (The term aerospace is derived from the words aeronautics and spaceflight.) The aerospace industry is engaged in the …
9Secret and special weapons in Showa Japan — This article refer to Plans for the incorporation and development of special or secret weapons in Imperial Japan during the first part of the Showa era, for the Second sino japanese war and World War II, that were originally hidden from public… …
10airplane — /air playn /, n. 1. a heavier than air aircraft kept aloft by the upward thrust exerted by the passing air on its fixed wings and driven by propellers, jet propulsion, etc. 2. any similar heavier than air aircraft, as a glider or helicopter. Also …
