Ministry officials said Wednesday with only 20 days left before the World Cup finals, the Ministry of Construction and Transportation plans to strengthen security at airports and on planes. The ministry said as a rush of foreign tourists are expected to visit Korea from mid-May, we plan to implement security measures in and around airports. Under the plan, it has distributed security guidelines to Korean Air and Asiana Airlines, and advised them to minimize offering alcoholic drinks during the flight. It has also completed installing an additional 6,925 security screening devices in 16 airports nationwide, and plans to expand the number of bomb-detecting inspectors to 33 from the current 18 at airports around the ten World Cup hosting cities. The ministry has ordered all employees working at Gimpo Airport to change their entry cards to security areas by May 18th, and for security officials to patrol the airport more than three times a day to detect any explosives.