Atacama Large Millimeter Array
ALMA is being built by Europe, the United States, Canada, East Asia and the Republic of Chile.  Costing more than a billion US dollars, it is the worlds's most expensive ground-based telescope. ALMA began scientific observations in the second half of 2011 and the first images were released to the press on 3 October 2011. The project is should be fully operational by March 2013.