Bangkok airport: No foreigners on overstay - even at the long stay car park!    Picture: Naew Na   Travelers to Thailand at the weekend were greeted by a large show of force determined to root out illegal migrants or foreigners on overstay and other trouble.    There were immigration officials from Region 2, men in army fatigues, regular police and even a man from the EOD bomb disposal team.    Picture: Naew Na   A sniffer dog completed