| Agent on horseback watches
over illegal immigrants.
patrol agents on horseback in Arizona.
Border Patrol observation tower with camera along Mexican border
|A Black Hawk helicopter lands on a public highway so its crew can
pursue illegal immigrants near Three Points. The Black Hawk, long a staple
of Army air operations, now is a cog for the Customs Service, whose officers
are participating in joint air operations across southern Arizona with
the Border Patrol, its sister agency.