The limitations inherent with air transport, especially aircraft internal carriage, create difficult mobility challenges.

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Haiti was subject to a massive earthquake in 2010 that significantly damaged an already fragile country. The response from the international community provides an excellent case study for those ...

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Physical barriers (apart from wire and ditches) include concrete blocks, beams, and posts, in addition to various improvised obstacles such as vehicles and logs. Self-evidently, of little utility ...