Detailed text transcripts for TV channel - CNN - 20110510:18:05:00
>> reporter: not far from there seven more would-be immigrants are arrested including this 32-year-old man. >> [ speaking foreign language ] >> reporter: before the night is over, agents say they will detain more than 300 people, and in is nogales, arizona, a fight in the battle front of the smuggling organizations. >> they like to operate under the cover of darkness because they feel they won't be scene. >> reporter: from a nearby control room, infrared technology gives agents eyes in the dark, and other surveillance towers and vehicles and an agent force that has doubled in more than the las...