The US Army is looking at building a massive lozenge-shaped blimp the size of a football field capable of transporting 500 tons at a time.
Project Walrus is very abitious but the implications are huge if this technology works and not just for the military.
[quote]The Walrus operational vehicle (OV) is envisioned to have the primary operational task of deploying composite loads of personnel and equipment (for example, the components of an Army Unit of Action) ready to fight within six hours after disembarking the aircraft. Walrus will operate without significant infrastructure and from unimproved landing sites, including rough ground having nominal five-foot-high obstacles. It is intended to carry a payload of more than 500 tons 12,000 nautical miles in less than seven days at a competitive cost. Additionally, Walrus will be capable of performing theater lift and supporting sea-basing and persistence missions to meet a range of multi-Service needs. [/quote]