1.   At airports, they pass through an immigration checkpoint where inspectors can look at their passports and check their names against a computer data base.

2.   At midday on Wednesday the convoy was stopped at an immigration checkpoint.

3.   Biometrics are used on a scaled-down basis at immigration checkpoints in some airports.

4.   Cradling purple hyacinths that they planned to give to the villagers, they marched through the immigration checkpoint, brushing past surprised agents.

5.   Immigration checkpoints have been set up along roads in Chiapas, and even tourists headed to Maya ruins have been told they have five days to leave the country.

6.   Nava-Reyes said the van drivers chose routes that would allow them to avoid known immigration checkpoints.

7.   The unit of a dozen officers checked the river outside Tapachula, often crossed by illegals, and a back road out of sight of immigration checkpoints.

8.   The World Travel and Tourism Council meeting in Washington on Wednesday and Thursday, IBM will demonstrate an automated system for speeding passengers through immigration checkpoints at airports.

9.   They made it to the highway, avoiding the immigration checkpoints.

10.   U.S. immigration officials fingerprint individuals now, but files are scattered among various immigration checkpoints.