The reporters here, where the five are being held, are saying that the plane was picked up by Homeland Security Radar.
From other thread. The muzzie suspect owns a flight school in San Antonio
http://www.beapilot.com/cgi-local/schools/record_display.pl?482
{A previous post said "I didn't know Homeland Security had radar".}
Just let me say it this way...an agency that is now under Homeland Security is what has the radar. And has had it for awhile. But only now is it being called Homeland Security radar, because that agency is now under this new cabinet dept.
By the way, I'm not saying I know the agency and don't won't to reveal it...I don't know it for sure. But it's one of them that offers a type of defense for this country...air defense or border defense or something. And the President has told us many times that these defenses are being beefed up.
Now let me welcome a fellow Texan to Free Republic. You did great!