A similar picture is here. [UPDATE: That and the following pics are no longer there; links removed.]
A scowling closeup with El Presidente pointing his finger is here. In that shot, his shirt looks vaguely like a guayabera.
The following shots have a Border Patrol symbol in the background: middle ground, long, and a side view.
UPDATE: While I'm not partial to the source, this photo-op appears to have gone fully according to the script written by White House chief of staff Josh Bolten:
1 DEPLOY GUNS AND BADGES. This is an unabashed play to members of the conservative base who are worried about illegal immigration. Under the banner of homeland security, the White House plans to seek more funding for an extremely visible enforcement crackdown at the Mexican border, including a beefed-up force of agents patrolling on all-terrain vehicles (ATVs). "It'll be more guys with guns and badges," said a proponent of the plan. "Think of the visuals. The President can go down and meet with the new recruits. He can go down to the border and meet with a bunch of guys and go ride around on an ATV."
Immigration · Thu, 05/18/2006 - 21:25 · Importance: 1