maintenance costs for buildings
21Lorin Cray House — U.S. National Register of Historic Places …
22MidAmerica St. Louis Airport — MidAmerica St. Louis Airport, 2 April 1998 Logo for the airport …
23Construction of the World Trade Center — For the post 9/11 rebuilding and ongoing construction at the World Trade Center site, see World Trade Center site. The completed World Trade Center in March 2001 The construction of the World Trade Center was conceived as an urban renewal project …
24Curtain wall — For defensive curtain walls in medieval buildings, see Curtain wall (fortification). Glass curtain wall of the Bauhaus Dessau A curtain wall is an outer covering of a building in which the outer walls are non structural, but merely keep out the… …
25Elevator — For other uses, see Elevator (disambiguation). A set of lifts in the lower level of a London Underground station. The arrows indicate each elevator s position and direction of travel …
26Kraków — For other uses, see Krakow (disambiguation) and Cracow (disambiguation). Kraków Main Market Square, Wawel Castle, Barbican, St. Mary s Basilica, St. Peter and Paul Church, Colleg …
27Nuclear power debate — For nuclear energy policies by nation, see Nuclear energy policy. For public protests about nuclear power, see Anti nuclear movement. Three of the reactors at Fukushima I overheated, causing meltdowns that eventually led to hydrogen explosions,… …
28O-Train — For the basketball player nicknamed O Train , see Oscar Robertson. O Train Info Loc …
29Office — For other uses, see Office (disambiguation). Office work …
30Ludwigshafen — For Ludwigshafen am Bodensee, see Bodman Ludwigshafen. Ludwigshafen am Rhein Railway station with elevated highway in background …
