41.   When he was with the Chicago Bears, Ryan built a defense that won a Super Bowl and was one of the best the game had ever seen.

42.   But new evidence suggests that exposure to pets early in life might actually help the body build defenses against allergies and even asthma.

43.   During the Cold War, the Soviet Union built defenses to protect Moscow.

44.   Ex-Soviet scientists could provide key information as America seeks to build a defense against chemical and biological agents, he said.

45.   However, it adds that the increase likely would be sped up if a missile defense were built.

46.   Shurmur built tough defenses that led the Packers to two consecutive Super Bowls.

47.   Sen. Kay Bailey Hutchison, R-Texas, said Wednesday she remained optimistic that reliable missile defenses can be built.

48.   So the new work is important in showing that the immune system can build effective defenses, Nabel said.

49.   Still, the outcome is important because Congress has made it the law that a national missile defense be built as soon as technically feasible.

50.   The extra money would give service personnel another pay raise, acquire more precision weapons and build missile defenses.