Egykor a világ legmagasabb felhőkarcolója volt, mára csak Chicago egén nincs riválisa

A US Marine Corps CH-46 helicopter, in support of US President Barack Obama's visit to Chicago, Illinois, flies near the Willis Tower, formerly known as the Sears Tower, February 15, 2013. Obama is traveling to speak on the economy, before continuing to Florida for the weekend. AFP PHOTO / Saul LOEB (Photo by SAUL LOEB / AFP)