51.   Some schools are going to high-tech surveillance systems.

52.   Sophisticated electronic surveillance systems being used against Russian sites in Washington were defeated.

53.   Such steps include everything from enhancing our disease surveillance system to ensuring an adequate supply of lifesaving vaccines and antibiotics.

54.   Surveillance systems raise so many legal, law-enforcement, insurance and regulatory implications that Resendes cannot imagine them becoming common.

55.   Surveillance systems installed by the homeowner can cost substantially less.

56.   That could be one of many reasons no one in Palm Beach County appears to be proposing new surveillance systems to deal with bioterrorism.

57.   That was a year after the National Academy of Sciences warned government officials to strengthen surveillance systems to defend against new and emerging infectious diseases.

58.   The atomic energy agency and the Ekeus commission have worked together in setting up surveillance systems.

59.   The CDC worked with Thailand to set up sophisticated infection surveillance systems that allowed it to track the path of its epidemic.

60.   The business makes underwater surveillance systems and electronic signal processing systems for military weapons.