478 mostly-illegal foreigners rounded up in immigration raid By The Thaiger   FILE PHOTO – One of the regular round-up of illegal foreigners   Police have netted another 478 mostly-illegal foreigners during surprise raids in more than 200 locations around Thailand yesterday (Wednesday) – most illegal immigrants. The assistant national police chief cited the 34th ASEAN Summit being held in Bangkok (that started today) as part of the security crackdown.   Po