When Tim Armstrong came on board in 2009, he added senior staff members from Google and Yahoo with an eye towards turning the company into the biggest creator of premium content on the Web and the largest seller of online display ads. Positioning AOL to be ready when the line between online and broadcast programming permanently blurred, he began assembling the infrastructure, acquiring a number of companies specializing in the delivery of online content, including studio Now, 5Min Media, Thing Labs, and Pictela.The real blockbuster acquisition was the Huffington Post in 2011 for $315 million. Armstrong appeared to be betting big on its charismatic leader, Arianna Huffington, and its 25 million unique monthly visitors. Around 20% of AOL's workforce was eliminated following the purchase.