The production of "The Amazing Race" is a challenge due to its premise being a race around the world. Among the difficult duties that producers face, scouting out locations, designing tasks, selecting teams, and planning logistics for the entire course are the most important to accomplish in pre-production. During the Race, the camera crews need to keep up with the movement of the teams and the host. And when the footage for the entire season has been recorded and edited, team members, production crew as well as the local staff who hosted or facilitated the tasks are obliged to keep the details of the race confidential and not leak out anything that hints at locations, events, or outcomes of the Race. An exception is the television network that airs the show in a country which hosted one of the legs where they can air teasers such as "Who among the teams will come here to (the network's home country name)?" However, in recent U.S. seasons, CBS had released a map to show the locations that the racers would be visiting.