Brazil appears to have taken a lesson from American bank robber great Willie Sutton who, when asked why he robbed banks, is alleged (but only alleged) to have said, "...because that's where the money is."
Such attacks have become commonplace in Brazil: Last year, an average of two banks or ATM machines were robbed every day, mainly in small towns without a major police presence.
The spoils can be substantial.
Each ATM has four boxes storing up to 2,700 bills apiece, meaning one cash machine stuffed with 100-real bills can yield up to 1 million reais ($263,000). Bank robbers skilled with dynamite - working quickly - will often blow up several ATMs at each bank or go directly for their vaults.