on the city's periphery and upper and middle classes are migrating toward Zapopan, making the situation less neatly divided. Since 1996, the activity of multinational corporations has had a significant effect on the economic and social development of the city. The presence of companies such as Kodak, Hewlett-Packard, Motorola and IBM has been based on production facilities built outside the city proper, bringing in foreign labor and capital. This was made possible in the 1980s by surplus labor, infrastructure improvements, and government incentives. These companies focus on electrical and electronic items, which is now one of Guadalajara's two main products (the other being beer). This has internationalized the economy, steering it away from manufacturing and toward services, dependent on technology and foreign investment. This has not been favorable for the unskilled working class and traditional labor sectors. The 1992 Guadalajara explosions occurred on April 22, 1992, when gasoline explosions in the sewer system over four hours destroyed of streets in the downtown district of Analco. Gante Street was the most damaged. Officially, 206 people were killed, nearly 500 injured and 15,000 were left homeless. The estimated monetary damage ranges between $300 million and $1 billion. The affected areas can be recognized by their more modern architecture. Three days before the explosion, residents started complaining of a strong gasoline-like smell coming from the sewers. City workers were dispatched to check the sewers and found dangerously high levels of gasoline fumes. However, no evacuations were ordered. An investigation into the disaster found that there were two precipitating causes. The first was new water pipes that were built too close to an existing gasoline pipeline. Chemical reactions between the pipes caused erosion. The second was a flaw in the sewer design that did not allow accumulated gases to escape. Arrests were made to indict those responsible for the blasts. Four officials of Pemex (the state oil company) were indicted and charged on the basis of negligence. Ultimately, however, these people were cleared of all charges. Calls for the restructuring of PEMEX were made but they were successfully resisted. The 1990s were marked by events such as the explosions of April 22, 1992, the Mexican peso crisis of 1994, and the murder of the Cardinal Juan Jesús Posadas Ocampo in 1993. The 1992 explosions caused massive infrastructure damage to hundreds of houses, avenues, streets, and businesses in the Analco colony, "without a clear delineator