Samaras' colleagues said he took numerous safety precautions, spending hours looking at weather models and developing safe escape routes and rendezvous points.

NPR: Storm Chasing Critical, Profitable And Dangerous

The American-born poor also experience these facilities as safe places to escape the pull of gangs and drugs on their youth and to make meaningful connections with fellow Christians who are more knowledgeable and connected to the economic mainstream.

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"It is hard to describe the enormous relief we felt at hearing the news of David and Tahir's escape and knowing he is safe, " a statement from Rohde's family said.

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"We've done one house with an escape pod in every room that releases to one safe room, " says Jonathan Fine of Las Vegas-based Sting Surveillance, which designs security systems for casinos, hotels and homes.

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But he was in safe hands, and Mr Wright applauded the courage of his Algerian colleagues in helping the expats escape.

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