 Complete the following phrase:  Paratroopers and glider-borne troops have been landed by aircraft on raids, including offensive counter-air missions such as those carried out by the Teishin Shudan and Giretsu Kuteitai commandos. In the modern era, the helicopter, allowing for both insertion and extraction, offers a superior method of raid transportation, although it comes at the cost of noise. During the Second World War, several air-landed raids were undertaken, including the German glider-borne 