When San Francisco prosecutors dismissed charges against Kristian Aspelin in early December, it became just the latest case to raise questions about how shaken baby syndrome is diagnosed. Aspelin, who was accused of causing the death of his infant son, had one thing in his favor: He had enough money to pay for medical experts who cast doubt on the prosecution's theory.
Since the mid-1980s, the U.S. Border Patrol has quintupled in size — growing from about 4,000 to more than 20,000 agents.
The government has constructed some 700 miles of fencing and vehicle barriers. It has placed thousands of ground sensors, lights, radar towers and cameras along the border. And Customs and Border Protection is now flying drones and helicopters to locate smuggles and rescue stranded immigrants.
So here's the question: Is the Southwest border secure?