Dogs can die of bloat within several hours. Even with treatment, as many as 25-33% of dogs with GDV die. The gastric dilatation is one part of the condition and the volvulus or torsion is the second part. In bloat (dilatation), due to a number of different and sometimes unknown reasons, the stomach fills up with air and puts pressure on the other organs and diaphragm. The pressure on the diaphragm makes it difficult for the dog to breathe.
The tunnel systems were of great importance to the Viet Cong in their resistance to American forces, and played a major role in North Vietnam winning the war. The Cu Chi tunnels were built over a period of 25 years that began sometime in the late 1940s during the war against the French.
The Channel Tunnel (French: Le tunnel sous la Manche; also referred to as the Chunnel) is a 50.5-kilometre (31.4 mi) rail tunnel linking Folkestone, Kent, in the United Kingdom, with Coquelles, Pas-de-Calais, near Calais in northern France, beneath the English Channel at the Strait of Dover.t its lowest point, it is 75 m (250 ft) deep. At 37.9 kilometres (23.5 mi), the tunnel has the longest undersea portion of any tunnel in the world, although the Seikan Tunnel in Japan is both longer overall at 53.85 kilometres (33.46 mi) and deeper at 240 metres (790 ft) below sea level.