A participant acting as a suicide bomber triggers a simulated explosive as members of Brazil's Coordenadoria de Recursos Especiais (CORE) police unit intervene during an aircraft interdiction scenario... more 
A participant acting as a suicide bomber triggers a simulated explosive as members of Brazil's Coordenadoria de Recursos Especiais (CORE) police unit intervene during an aircraft interdiction scenario at the Oakland International Airport at Urban Shield 2013 in Oakland, California October 26, 2013. Urban Shield 2013 is a planned training exercise involving local, national, and international first responder agencies that runs continuously for 48 hours and presents a variety of scenarios which will challenge the teams' ability to perform in varying conditions within both mentally and physically demanding environments. Picture taken October 26, 2013. REUTERS/Stephen Lam (UNITED STATES - Tags: CRIME LAW) less 
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Reuters | Photo By STEPHEN LAM / REUTERS
Tue, Oct 29, 2013 11:43 AM EDT