US President Joe Biden’s decision to exclude the presidents of three countries has overshadowed the summit’s agenda.
Lucia Newman, based in Buenos Aires, is Al Jazeera's Latin America editor. She has 25 years of experience in television and journalism. A recipient of... many awards in journalism, in 2001 Lucia picked up the prestigious Edward R Morrow Award for "sustained coverage of Elian Gonzalez", the child at the centre of a heated custody and immigration battle in 2000 involving the Cuban and US governments.
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Antarctica, which is used for scientific purposes, belongs to no single nation and is governed by treaties.