Phil B your citation included:
The strategy makes only brief mention of technology in the wake of a failed $1 billion program that was supposed to put a network of cameras, ground sensors and radars along the entire border.
There is a "hue & cry" in the UK currently over various failings of UK border policy and implementation, notably long queues at London Heathrow before the anticipated Olympic rush. In the background is the failure of a large IT project 'E-Borders', which aimed to collect all passenger data for flights in and out of he UK, to pre-alert staff at the border. Plus a reduction in staff who do the checks.

The US program had a different approach, IMO the common link is a reliance on an IT-based network to provide targeting information.