Billions of tax-payer dollars have been spent to secure the U.S-Mexico border from illegal immigration and drug trafficking. Yet, according to two federal oversight agencies, it is not clear whether the investments made are providing a favorable return. More importantly, there is no mechanism to measure the effectiveness or success of the investments made to secure the border.

A 208-foot long white blimp has been floating two miles above Yuma Proving Ground, Arizona, using radar continuously to scan the area along the border, looking for low-flying aircraft drug smugglers use to bring drugs into the United States. The sensors on board can detect activity in distances of up to 230 miles. The blimp, had been operated by the U.S. Air Force, but DHS has now assumed responsibility for it. It is one of eight aerostats deployed along the U.S. southern border.

Immigration judges should be allowed to consider a person’s family and social ties to the United States before ordering the deportation of legal permanent residents for minor offenses, says a new study. The study aso found that 98 percent of all deportees are sent to Latin America and the Caribbean even though people from those countries do not make up 98 percent of all immigrants.

In 2006, the town of Hazelton, Pennsylvania, passed ordinances which denied licenses to businesses which knowingly hire undocumented workers and fined landlords who rented apartments to illegal immigrants. The ordinances have been emulated by several other states and cities since. On Friday, an appeals court declared the ordinance unconstitutional: “The ordinances disrupt a well-established federal scheme for regulating the presence and employment of immigrants in the U.S.,” Judge Munley wrote, adding that such ordinances violate the Supremacy Clause of the U.S. Constitution.

Idaho became the third state to join the Records and Information from DMV’s for E-Verify (RIDE) program on Sunday. The other two states are Mississippi and Florida. RIDE automates motor vehicle document verification between Motor Vehicle Agencies (MVAs) and the United States Citizenship and Immigration Services (USCIS).

Opponents of immigration reform argue that undocumented immigrants would be a drain on federal, state, and local government resources if granted legal status under reform. It is also true, however, that the 11.2 million undocumented immigrants living in the United States are already taxpayers, and that their local, state, and federal tax contributions would increase under reform.

Customs and Border Protection (CBP) currently has eight Predator drones used on the northern and southern borders, and two more drones watching the Caribbean. The drones are equipped with high-tech cameras. Critics say drones are not an efficient way to monitor the border, and that they lead to few arrests and seizures. Other critics are worry about something else: a recent CBP report show that the agency is considering arming these drones with “expendables or non-lethal weapons designed to immobilize [targets of interest].”

A bi-partisan group of House lawmakers is working to include a provision in the House immigration legislation which will make it easier to travel to the United States. Travel industry groups support the effort, having fought for years to get the government to relax security measures. The industry has argued that these measures have turned off many foreigners from traveling to the United States.

The Senate yesterday, on a vote of 68-32, approved a sweeping immigration overhaul bill, the most important immigration measure since the 1986 Immigration and Reform Act (IRCA). The measure offers a path to citizenship to about eleven million illegal immigrants currently in the United States and allocates billions of dollars to bolstering border security.