Tibet closed to foreigners again but tourism booms

China has closed Tibet to overseas travelers from Thursday until the end of March, three travel agents told CNN, but with or without foreigners, tourism to the isolated mountain region is booming. The closure has been an annual occurrence since 2008 when the Tibetan capital Lhasa was rocked by riots linked to the anniversary of an uprising against Beijing rule. Authorities have also stopped issuing travel permits to foreign travelers at short notice during periodic unrest. Read more