Marlene Heyman (L) and Lucia Christe perform at the Tango World Tournament in Buenos Aires on August 20, 2013

Marlene Heyman (L) and Lucia Christe perform during the qualification round of the Tango World Tournament in Buenos Aires on August 20, 2013. For the first time in eleven editions leading the tournament in Buenos Aires, the audience observed the skills of same-sex dancers couples.