Agger Tange (which had linked Thy with the rest of Jutland at the western end of Limfjord) in the 1825 North Sea storm. The after effects of the state bankruptcy in 1813 also contributed to widespread poverty in the city. In the mid-19th-century, Aalborg was overtaken by Aarhus as the largest city in Jutland. Towards the end of the 19th century there was however an upturn. In 1865, the pontoon bridge over Limfjord was completed, and in 1869, the railway reached the city with a railway bridge over the sound to Vendsyssel three years later. The harbour facilities were also improved, making Aalborg Denmark's second port. Aalborg became the country's main producer of tobacco products and spirits, followed in the 1890s by fertilisers and cement. By 1901, the population had increased to almost 31,500. 20th century industrialisation Around the beginning of the 20th century, as a result of decisions taken by the municipality, many of the city's half-timbered houses were torn down. They were replaced by hundreds of modern buildings, completely changing the look of the city. Factories with smoking chimneys became ever more prevalent in the outskirts. Among the most important were De Danske Spritfabrikker (spirits and liquors), De forenede Textilfabrikker (textiles), the East Asiatic Company (trading), Dansk Eternit (building materials) and C.W. Obel's tobacco factory (established in 1787). Aalborg Portland, run by F.L. Smidth, was one of several cement factories operating in 1913, together employing some 800 workers. By the 1930s, Aalborg was being promoted as "Denmark's new centre for industry and workers". Replanning continued with additional thoroughfares cutting through the city. The port facilities were also improved with the help of a dredger and the opening of new docks. In 1933, Christian X inaugurated a new bridge over Limfjord to replace the fragile pontoon crossing. Aalborg Airport, officially opened in 1938 because of the success of the cement industry, had in fact operated flights to Copenhagen since 1936. During the German invasion of Denmark in 1940, the airport was captured by German paratroopers on the night of 21 April as a base for German aircraft flying to Norway. On 13 August 1940, a dozen Bristol Blenheim bombers of No. 82 Squadron RAF were launched against the Luftwaffe airfield during one of the most disastrous Royal Air Force raids of the war. One turned back because of fuel problems, but all of the remaining 11 were shot down