One World Trade Center (WTC) was awarded the 2015 Best Tall Building Award for the U.S. from The Council on Tall Buildings and Urban Habitat (CTBUH). WSP, a global engineering and professional services organization, served as structural engineer for the 104-story office tower on behalf of the Port Authority of New York and New Jersey.

The interactive timeline below shows how the London skyline has changed over the past 50 years. London's skyline has been changing rapidly, especially over the last 15 years with skyscarpers like the Walkie-Talkie, Heron Tower and the Shard being completed. There are currently over 200 new buildings over 20 stories tall proposed in London ensuring that the skyline will continue to change in the future.

SURE Architecture unveiled plans this week for a futuristic skyscraper that could house thousands of people and have its own ecosystem. The Endless City proposal has already won the Skyscrapers and SuperSkyscrapers Competition. The firm believes the skyscraper would be a great space saver for densely populated cities because it will allow them to expand upward instead of outward. Although still in the planning stage and without any guarantees it will ever be built, SURE has earmarked a plot of land just north of the City of London to build the vertical city. If completed, the Endless city could be as tall as 300 meters, close to London’s tallest building the Shard, and take up an area of 165,000 square meters.

Chicago Ironworker Danny Drozd has spent 13 years working on various jobs around the city of Chicago including the Trump Tower, McCormick Place, and other skyscrapers.  He realized he had a tough time explaining to his friends what an ironworker does so he decided to attach a GoPro to his helmet one day and show what them what his day at work is like at his newest project.  Last week he posted the video to Youtube and it already has 300,000 views.

A new $900 million, 740-foot skyscraper is being proposed for Boston’s Financial District. If approved, the skyscraper would be the tallest building in the Financial District and the third tallest building in the city. Entrepreneur Steve Belkin is hoping to receive approval for the tower after failing to receive enough interest or funding for a 1,000-foot building at the same location in 2006. If built, the complex would include office and retail space, a 300-room hotel, and possibly condominiums on the upper floors. The tower would be one of a few skyscrapers built in the area since the 1980s.

London’s newest and tallest skyscraper opened its doors to the public last weekend after being under construction for the past three years.  The building is officially known as the Leadenhall Building, named after its location at 122 Leadenhall St, but is more commonly referred to as the Cheesegrater due to its wedge shape.  Rogers Stirk Harbour + Partners designed the 738-foot, 48-story building and Arup were the structural engineers for the project.  Nearly 80% of the $465 million building was prefabricated in the north of England and transported to the site in the middle of the night, proving to be one of the main challenges associated with the project.

Developers Wright Runstand & Company released drawings yesterday of a new building that will be built in Rainier Square in Seattle, Washington. The 58-story tower will include residential, office, restaurant, and retail space.  The developers hope to break ground later next year and complete the tower by 2017. Once completed, the tower will become Seattle’s second tallest skyscraper.

CNN recently compiled a list of the world’s tallest buildings scheduled for completion in 2015. The top ten list is dominated by China and the Middle east which each having four and three representatives on the list respectively. The Vostok Tower and the OSO-South Tower, both being built in Moscow, provide Russia with two buildings on the list, and North America’s lone representative comes from 432 Park Avenue in New York City.

While One World Trade Center in New York tops the list of the tallest buildings in the western hemisphere, it also holds another distinction it is probably not so proud of: the world’s most expensive skyscraper. Buildings Analyst Emporis recently released a list of the top ten costliest skyscrapers in history. The $3.9 billion One World Trade Center tops the list followed by the $1.9 billion Pallazo in Las Vegas and the $1.9 billion The Shard in London. In fifth place is the world’s tallest building, the Burj Khalifa. The $1 billion Bank of America building in New York is North America’s third representative on the list.

The ten-foot thick foundation mat for Comcast’s new Innovation and Technology Center in Philadelphia, Pennsylvania was successfully poured on Saturday. Concrete contractor B. Pietrini & Sons started pouring the foundation around 1 a.m on Saturday and finished roughly twelve hours later. The contractor coordinated 50 concrete trucks making over 400 deliveries to the jobsite on Saturday morning making the building’s foundation one of the largest concrete pours in Philadelphia history.