With a change in government and international sentiment, normal air traffic resumed in 2001. A few years later the airport's terminal 2 underwent a major reconstruction. The runway was upgraded to CAT IIIb in 2005, as part of a large renovation project. CAT IIIb is the latest runway system, giving aircraft the security of landing during fog and storms. In 2006, the airport was renamed to "Belgrade Nikola Tesla Airport". Nikola Tesla was a Serbian-American inventor and scientist, generally considered one of the world's most famous inventors. The construction of the new air traffic control center was completed in 2010. In 2011 Belgrade Nikola Tesla Airport shares (AERO) began trading on the Belgrade Stock Exchange (BELEX).