to damage construction materials during transportation
51Package testing — Military shipping container being drop tested Testing …
52Rocket engine — RS 68 being tested at NASA s Stennis Space Center. The nearly transparent exhaust is due to this engine s exhaust being mostly superheated steam (water vapor from its propellants, hydrogen and oxygen) …
53Road traffic safety — Sidewalks, curbs and traffic signals in Maryland, United States …
54Nagoya Castle — For Nagoya Castle in Hizen Province, see Nagoya Castle (Hizen Province). Nagoya Castle 名古屋城 Nagoya, Japan …
55Colonization of Mars — An artist s conception of the colonization of Mars, with a cutaway showing part of the interior The colonization of Mars by humans is the focus of speculation and serious study because the surface conditions and availability of water on Mars make …
56Quezon, Isabela — Infobox Philippine municipality infoboxtitle = Municipality of Quezon sealfile = Quezon isabela.png locatormapfile = Ph locator isabela quezon.png| caption = Map of Isabela showing the location of Quezon. region = Cagayan Valley (Region II)… …
57Bălți — See also: Belz Bălți Municipality of Bălţi …
58Economy of Nigeria — Currency Nigerian naira (N) (NGN) Trade organisations OPEC Statistics GDP $377.6 billion (2010 est.) (PPP; 31st) …
59Second Intifada — Part of the Israeli–Palestinian conflict and Arab–Israeli conflict Clockwise from above: A masked P …
60El Paso, Texas — El Paso redirects here. For other uses, see El Paso (disambiguation). City of El Paso   City   From top left to bottom right: Downtown El Pas …
