What firm founded in 1915 did work on the the tallest building in the Western Hemisphere
Jaros, Baum & Bolles
Jaros, Baum &amp; Bolles
Jaros, Baum & Bolles (JB&B) is an American MEP (Mechanical, electrical, and plumbing) and building systems engineering firm founded in 1915 by Alfred L. Jaros, Jr. and Albert L. Baum.
 The firm is best known for high-rise projects, including One World Trade Center and Hudson Yards in New York City, the Sears Tower in Chicago and the Bank of China Tower in Hong Kong.
One World Trade Center
One World Trade Center (also known as 1 World Trade Center, 1 WTC or Freedom Tower ) is the main building of the rebuilt World Trade Center complex in Lower Manhattan, New York City.
 It is the tallest building in the Western Hemisphere, and the sixth-tallest in the world.
 The supertall structure has the same name as the North Tower of the original World Trade Center, which was destroyed in the terrorist attacks of September 11, 2001.
 The new skyscraper stands on the northwest corner of the 16 acre World Trade Center site, on the site of the original 6 World Trade Center.
 The building is bounded by West Street to the west, Vesey Street to the north, Fulton Street to the south, and Washington Street to the east.
List of tallest buildings in Adelaide
This list of tallest buildings in Adelaide ranks the tallest buildings in Adelaide, South Australia by height.
 The tallest building in Adelaide is currently the 31–story Westpac House, which rises 132 m and was completed in 1988, as of October 2013 it is Australia's 115th tallest building.
 There are numerous projects either underway or planned in Adelaide, if constructed, Frome Central Tower 1 (11-27 Frome Street) would reach 134 m , therefore becoming the city's tallest building.
 The tallest approved building in Adelaide is the Sofitel Hotel (104-108 Currie Street), which will be 115 m , it is planned to become the city's second tallest building upon completion.
 Height restrictions–enforced since the 1990s–have limited the amount of skyscrapers constructed in the city although they have been eased in recent times. List of tallest buildings in Pennsylvania
This lists the tallest buildings in Pennsylvania, over 120 meters (400 feet), ranked by height.
 The tallest building in Pennsylvania is the 58-story Comcast Center located in Philadelphia, which at 975 feet (297 meters) is currently the 20th-tallest building in the United States.
 It was topped out on June 18, 2007, to become the tallest building in Philadelphia and the state.
 The currently under construction Comcast Technology Center in Philadelphia, which will rise 60 stories and 1121 feet tall, will be the tallest building in Philadelphia and the state of Pennsylvania upon its completion in 2018.
 It will also be the 9th tallest building in the United States.
 All of the buildings over 120 meters are in Philadelphia and Pittsburgh; 30 are in Philadelphia and 16 are in Pittsburgh. JPMorgan Chase Tower (Houston)
The JPMorgan Chase Tower, formerly Texas Commerce Tower, is a 305.4 m , 75-story, 2,243,013 sq.ft skyscraper at 600 Travis Street in Downtown Houston, Texas.
 It is currently the tallest building in the city, the tallest building in Texas, the tallest five-sided building in the world, the 18th tallest building in the United States, and the 107th tallest building in the world. List of tallest buildings in Detroit
This list of tallest buildings in Detroit ranks skyscrapers and high rises in the U.S. city of Detroit, Michigan by height.
 The tallest skyscraper in Detroit is the 73-story Detroit Marriott at the Renaissance Center, which rises 727 ft along Detroit's International Riverfront.
 It is the tallest building in the state of Michigan, the 97th-tallest building in the United States, and the second tallest hotel building in the Western Hemisphere.
 Another famous skyscraper is One Detroit Center, which stands as the 2nd-tallest building in the city and the state. List of tallest buildings in New York City
New York City, the most populous city in the United States, is home to over 6486 completed high rise building of at least 35 meters, of which at least 113 completed are taller than 600 ft .
The tallest building in New York is One World Trade Center, which rises 1776 ft .
 The 104-story skyscraper also stands as the tallest building in the United States, the tallest building in the Western Hemisphere, and the sixth-tallest building in the world.
 The second-tallest building in the city is 432 Park Avenue, standing at 1396 ft , and the third-tallest is the 102-story Empire State Building in Midtown Manhattan, which was finished in 1931 and rises to 1250 ft , increased to 1454 ft by its antenna.
 It is the fifth-tallest building in the United States and the 25th-tallest building in the world. U.S. Bank Tower (Los Angeles)
U.S. Bank Tower, formerly Library Tower and First Interstate Bank World Center, is a 1018 ft skyscraper at 633 West Fifth Street in downtown Los Angeles, California.
 It is the third tallest building in California, the second tallest building in LA, the fifteenth tallest in the United States, the third tallest west of the Mississippi River after the Salesforce Tower and the Wilshire Grand Center, and the 92nd tallest building in the world, after being surpassed by the Wilshire Grand Center.
 Because local building codes required all high-rise buildings to have a helipad, it was known as the tallest building in the world with a roof-top heliport from its completion in 1989 to 2004 when Taipei 101 opened.
 It is also the third tallest building in a major active seismic region; its structure was designed to resist an earthquake of 8.3 on the Richter scale.
 It consists of 73 stories above ground and two parking levels below ground.
 Construction began in 1987 with completion in 1989.
 The building was designed by Henry N. Cobb of the architectural firm Pei Cobb Freed & Partners and cost $350 million to build.
 It is one of the most recognizable buildings in Los Angeles, and often appears in establishing shots for the city in films and television programs. List of tallest buildings in Corpus Christi
This list of tallest buildings in Corpus Christi ranks high-rises in the U.S. city of Corpus Christi, Texas by height.
 The tallest building in Corpus Christi is the 28-story One Shoreline Plaza South Tower, which rises 411 feet (125 m) and was completed in 1988.
 It also stands as the tallest building in Texas south of San Antonio.
 The building is located on a complex which also contains the second tallest building in the city at 375 feet (114 m).
 The third tallest building is the Frost Bank Plaza.
 It stood as the city's tallest building from 1983 to 1988. Willis Tower
The Willis Tower, built as and still commonly referred to as the Sears Tower, is a 110-story, 442.1 m skyscraper in Chicago, Illinois, United States.
 At completion in 1973, it surpassed the World Trade Center towers in New York to become the tallest building in the world, a title it held for nearly 25 years and remained the tallest building in the Western Hemisphere until 2014 and the completion of a new building at the World Trade Center site.
 The building is considered a seminal achievement for its architect Fazlur Rahman Khan.
 The Willis Tower is the second-tallest building in the United States and the 16th-tallest in the world.
 More than one million people visit its observation deck each year, making it one of Chicago's most popular tourist destinations.
 The structure was renamed in 2009 by the Willis Group as part of its lease on a portion of the tower's space.