from 1960 on the secondary sector is going down and now is a mere shadow of its former self, the manufacture of steel goods remain important. The economy of the region is now diversified; the most important centres are: Mechanical industries (Aircraft engine and Spacecraft propulsion), space technology, information technology, biotechnology and the production of water, beer or chocolate. Liège has an important group of headquarters dedicated to high-technology, such as Techspace Aero, which manufactures pieces for the Airbus A380 or the rocket Ariane 5. Other stand-out sectors include Amós which manufactures optical components for telescopes and Drytec, which produces compressed air dryers. Liège also has many other electronic companies such as SAP, EVS, Gillam, AnB, Balteau, IP Trade. Other prominent businesses are the global leader in light armament FN Herstal, the beer company Jupiler, the chocolate company Galler, and the water and soda companies Spa and Chaudfontaine. A science park south east of the city, near the University of Liège campus, houses spin-offs and high technology businesses. 1812 mine accident In 1812 there were three coal pits (Bure) in close proximity just outside the city gates: Bure Triquenotte, Bure de Beaujone and Bure Mamonster. The first two shafts were joined underground, but the last one was a separate colliery. The shafts were deep. Water was led to a sump (serrement) from which it could be pumped to the surface. At 11:00 on 28 February 1812 the sump in the Beaujone mine failed and flooded the entire colliery. Of the 127 men down the mine at the time 35 escaped by the main shaft, but 74 were trapped. [These numbers are taken from the report, the 18 miner discrepancy is unexplained.] The trapped men attempted to dig a passageway into Mamonster. After there was a firedamp explosion and they realised that they had penetrated some old workings belonging to an abandoned mine, Martin Wery. The overseer, Monsieur Goffin, led the men to the point in Martin Wery which he judged closest to Mamonster and they commence to dig. By the second day they had run out of candles and dug the remainder of a gallery in darkness. On the surface the only possible rescue was held to be via Mamonster. A heading was driven towards Beaujone with all possible speed, including blasting. The trapped miners heard the rescuers and vice versa. Five days after the accident communication was possible and