WILLIS TOWER,THE SKYSCRAPER CENTER,CITIES,BUILDINGS,COMPANIES,CREATE,LISTS,GRAPHICS,COMPARE,DATA,SEARCH,CHINESE,CLICK,IMAGE,VIEW,VERSION,HEIGHT,ARCHITECTURAL,OBSERVATORY,ABOVE GROUND,BELOW,ELEVATOR,TOWER,FACTS,OFFICIAL NAME,NAMES,SEARS TOWER,STRUCTURE,TYPE,BUILDING,STATUS,COUNTRY,UNITED STATES,CHICAGO,STREET ADDRESS,233 SOUTH WACKER DRIVE,POSTAL CODE,FUNCTION,OFFICE,STRUCTURAL MATERIAL,STEEL CONSTRUCTION,START,COMPLETION,OFFICIAL WEBSITE,RANKINGS,ARROWS,THE NEXT,SHORTER,GLOBAL,RANKING,IN THE WORLD,REGIONAL,NORTH AMERICA,NATIONAL,RANKING 1,INVOLVED,THE BLACKSTONE GROUP L P,DEVELOPER,SEARS ROEBUCK AND COMPANY,ARCHITECT,BULL,DESIGN,SKIDMORE OWINGS MERRILL,STRUCTURAL ENGINEER,ENGINEER,BAUM,MAIN CONTRACTOR,MORSE,DIESEL,INTERNATIONAL,CONSULTANT,ENCLOS,CORP,BULL FIRE,ENGINEERING,CORPORATION,PROPERTY MANAGEMENT,VERTICAL,TRANSPORTATION,ASSOCIATES,WIND,ALAN,WIND ENGINEERING,GROUP,MATERIAL,CLADDING,SEALANTS,DOW CORNING CORPORATION,STEEL,AMERICAN BRIDGE CO,THE WILLIS TOWER,SIGNATURE,BLACK,ALUMINUM,BRONZE,GLARE,GLASS,NEARLY,25 YEARS,THE STANDARD,SUPERTALL,SKYSCRAPERS,THE GLOBE,INNOVATIVE,SQUARE METERS,SPACE,FOUNDATION,TAKING,ENTIRE,CITY BLOCK,BEGINS,STEP BACK,THE STRUCTURE,ARCHITECTS,DIRECT,SEARS,REQUIREMENTS,DESIGNERS,DEVELOP,NECESSARY,OPERATION,VARIETY,SMALLER,BE MORE,SUITABLE,TENANTS,LESS,FLOOR AREA,TUBE,KIND,STRUCTURALLY,EFFICIENT,ECONOMICAL,PROVEN,TYPOLOGY,BURJ KHALIFA,FEATURES,KEPT,THE TOWER,ACTIVE,OPERATIONAL LIFE,ALEXANDER CALDER,SCULPTURE,GREETS,OFFICE WORKERS,IN THE WEST,LOBBY,MEANWHILE,ADDITION,OBSERVATION DECK,VISITORS,VERTIGO,THE LEDGE,BOXES,FROM THE TOP,AN AGE,SUSTAINABLE DESIGN,OWNERS,RECENTLY,SUSTAINABLE,ELEMENTS,LOW FLOW,CONSERVE,LITERS,WATER,HIGH,EFFICIENCY,LIGHTING,SYSTEMS,HELP,CURB,ELECTRICAL,CTBUH,INITIATIVES,COMPANY,WORLDS,NDASH,RESEARCH,YEAR IN REVIEW,TALL,TRENDS,JOURNAL,PAPER,REPORT,TOUR,RELATED,OLDER,COUNCIL,DERIVED,THE LIST,PROJECTS,DETERMINED,200 METERS,GREATER,AROUND THE WORLD,SETTING,RECORD,ANNUAL,DELEGATES,MARVELS,THE MODERN,MARVEL,LEAD,STUDY,TRIP,29 MAY,GROUP OF 20,BELGIAN,REAL ESTATE,PROFESSIONALS,TRAVELED,MAY 25,VISIT,TALL BUILDINGS,BELGIUM,QUESTION,REPURPOSE,REPLACE,EVENT,RECENT,SEMINAR,THE QUESTION,SHOULD,EXISTING,OUTDATED,TONGJI UNIVERSITY,FACULTY,STUDENTS,TOWARDS ZERO,CARBON,COLLABORATIVE,DESIGN STUDIO,ILLINOIS INSTITUTE OF,TECHNOLOGY,WEEK,GOING UP,THE THIRD,THE SPORTS,STAFF,FRIENDS OF,STAIR CLIMBING,RACE,ANALYSIS,GLOBAL POPULATION,EVER,INCREASING,RATE,THE RELATIONSHIP BETWEEN,POPULATION,PRESENTS,INFORMATION,HELLIP,RUNNING,THE CHANCE,CLIMB,THE 2,STAIRS,103RD,FLOOR,WILLIS,THE HISTORY OF,MEASURING,ARTICLE,THE EVENTS,COUNCILS,SOMETIMES,COMPLEX,HISTORY OF,WILLIS SEARS,UNIQUE,OPPORTUNITY,GLOBAL NEWS,FOR SALE,ONCE,GLASS FLOOR,SKYDECK,CRACKS,SUSPENDED,LIGHTNING,PHOTOGRAPHER,SCOTT OLSON,CAPTURED,IMAGE OF,BELOVED,COME TO LIFE,ANIMATION,EXHIBIT,OMNIPRESENCE,IN THE CITY,TOURIST ATTRACTIONS,HIRED,BROKERAGE,MARKET,STORY OF,TOWERS,WEST,FACADE,CLOSED,COATING,NIGHT,JUNE 12,STORMS,DOWNTOWN CHICAGO,THE BIRTHPLACE,THE SKYSCRAPER,ARTIST,SHORT FILM,MOTION GRAPHICS,HONOR,FREE,EXHIBITION,SCALE,PHOTOGRAPHS,MARK,LOOKS,RE EXAMINE,THE TOWERS,IMPACT,NEW YORK,CONTEXT,GARY BARNETT,DEVELOPMENT,CLARK,BROOKFIELD,SILVERSTEIN PROPERTIES,LONDON,WILLIS GROUP,CARMINE,INTERVIEW,EMERGING,CORPORATE,MOBILITY,PRESENTATION,CONFERENCE,DEVELOPMENT CORPORATION,RIC CLARK,BROOKFIELD PROPERTIES,JOSEPH MOINIAN,LARRY SILVERSTEIN,DISCUSS,1970S,WILLIS FABER DUMAS,IPSWICH,LIME STREET LONDON,WINNER,EUROPE,INTERVIEWS,INTERVIEWED,JEFF,THE BREWERY,MANAGEMENT,SHANGHAI,CONGRESS,TONY,LYNN S BEEDLE,LIFETIME ACHIEVEMENT AWARD,40 YEARS,DESIGNING,AWARDS,ADRIAN SMITH,ADRIAN SMITH GORDON GILL,ARCHITECTURE,AS ONE,FOREMOST,EXPERTS,ADRIAN,DEVELOPMENT OF,TALL TALES,THE TALL,SEOUL,MARK SARKISIAN,ONGOING,UBIQUITOUS,PROJECT,MODERNISM,HUMANITY,UNIVERSALITY,TRANSFORMATIONS,MUTATIONS,125 YEARS,REFLECTIONS,MAYOR RICHARD M DALEY,CITY OF CHICAGO,HIGHLIGHTS,HISTORICAL,CHALLENGES,BEHIND,SUSTAINABLE URBAN DEVELOPMENT,RETROFIT,AS GG,FOUNDER,CHAIRMAN,LYNN,LEADER,PRESENTATIONS,MEETINGS,VIDEO,BIOGRAPHY,COUNCIL ON TALL BUILDINGS,NARRATED,DAVID,DINNER,BROWSE,HUNDREDS,EVENTS,CONFERENCES,VIDEO LIBRARY,PAPERS,ISSUE,NUMBERS,HIGHEST,OBSERVATION DECKS,IMAGINING,THE FUTURE,JASON,MARTY,CARVER,MARSHALL,ELEMENT,PURE PLEASURE,STANDING,IN THE SKY,THE VIEW,ONES,SURROUNDINGS,JOSEF,RALPH WILSON,ARUP,PREDICTING,IMPOSSIBLE,TASK,NEVER,ABSOLUTELY,RIGHT,MAKE IT,POINTLESS,EXERCISE,DISCUSSION,URBAN,THE TALLEST BUILDINGS IN,THE WORLD,PAST PRESENT FUTURE,OVER TIME,AVERAGE HEIGHT,THE 100,JUMPED,STRUCTURAL,STEEL BUILDING,SPRING,MIMAR SINAN UNIVERSITY,INTEGRATION,ARCHITECTURAL DESIGN,PERSPECTIVE,THE CURRENT,PUBLISHED,RANGE,MULTI DISCIPLINARY,THE RESEARCH,LIBRARY,ONE WORLD TRADE CENTER,PETRONAS TOWER 1,DATABASE,CONTACT,HABITAT,PLEASE,PRINTING,BACKGROUND COLORS,IMAGES,PRESERVE,FULL,WEBSITE,EXPERIENCE,INTERNET EXPLORER,PRINT,PAGE,CHECK,GOOGLE CHROME,THE BACKGROUND,COLORS,OPTIONS,SECTION,MOZILLA FIREFOX,FILE PAGE,