The work of a Border Patrol Agent?

What is an average day like for a U.S. Border Patrol Agent? While in the Academy? Fresh out of the Academy? As a journeyman agent?

All the materials I've found about the USBP seem to claim that its primary mission is now preventing terrorists and their weapons from getting into the U.S., implying that their traditional mission of stopping the flow of illegal immigrants and drugs, while still important, is somehow secondary. Is there any truth to this, or is it just PR? What kind of duties does today's Border Patrol Agent perform, and how, if at all, is it different now from how it was before 9/11? What is CBP's role vis-a-vis the Global War on Terror?

Also, is there a place I can get more info on the various assignments open to journeyman agents (anti-smuggling operations, SRT, BORTAC, BORSTAR, etc.), beyond what's available in the recruitment fliers and CBP's website?