"There is a series of sectors which could be severely disrupted by terrorist attacks, particularly if they were to happen in several member states simultaneously"

This quote by Gijs de Vries is describing the prospective interruption of particular sectors of the economy due to terrorist attacks. He is suggesting that if terrorist attacks were to take place in several nations at the same time, the impacts might be particularly serious. This could consist of a disturbance of the supply chain, a reduction in consumer self-confidence, and a decrease in investment. In addition, it could result in a decline in tourism, a decline in trade, and a reduction in the schedule of products and services. All of these aspects could have a considerable impact on the economy, causing a decrease in economic growth and a boost in unemployment. Ultimately, this could result in a decrease in the standard of living for lots of people. Therefore, it is important to take measures to prevent terrorist attacks and to ensure that the economy stays steady.