Blackout in South America raises questions about power grid
By Luis Andres Henao & Paul Byrne
A blackout left tens of millions in South America without power. Officials still don't know what caused it
By Helen Regan & Eliott C. Mclaughlin
Argentina Power Outage: Electricity Failure Sweeps South America
By Amy Stillman & Jorgelina Do Rosario
Millions across South America hit by massive power cut
By Tom Phillips & Uki Goñi
'Massive failure' leaves Argentina, Paraguay and Uruguay with no power, utility says
By Eliott C. Mclaughlin