One World Trade Centre's spire is hoisted atop the skyscraper
One World Trade Center stands in construction as the first of 18 segment of a spire crowning it was hoisted into place, in New York, December 12, 2012. At 104 -storeys, it is the highest building in New York and when the 408-foot spire is complete it will become the tallest in the western hemisphere, hitting 1,776 feet. (AFP/Getty Images)
In a rare interview, Ayman Hariri reveals the raw grief he still experiences 12 years after the assassination of his father, former Lebanese prime minister Rafik Hariri, and the lessons he learnt that have inspired him to take on formidable social media giants.