Airtight blast resistant cargo container

An explosion resistant containment device, said device comprising:

• a container surrounding a cargo hold, said container having an opening defined by an edge to provide access to said cargo hold, and a flange formed around said edge of said opening and extending into said cargo hold to establish a seat inside said container between said flange and said container;
• a door having a panel circumscribed by a border, said panel having a surface and a bite formed along said border on said surface, wherein said bite extends away from said surface and is dimensioned to contact said seat when said bite is positioned against said seat for covering said opening with said panel;
• a means for holding said door over said opening in response to an explosive blast in said cargo hold;
• a first cradle mounted to a first surface inside said container;
• and
• a second cradle mounted to a second surface inside said container, where said first surface is substantially parallel to said second surface, and said door is positioned between said first cradle and said second cradle for guiding movement of said door in a substantially lateral direction inside said container when said door retracts internally into said cargo hold to expose said opening in said container.