61.   Because different flu strains circle the globe each year, a new flu vaccine must be brewed annually.

62.   Different influenza strains circle the globe annually.

63.   During his years at the Illinois Institute of Technology, the idea of circling the globe began to germinate.

64.   Ducking turbulent weather above him, American adventurer Steve Fossett continued drifting over the south Pacific in his bid to become the first solo balloonist to circle the globe.

65.   Endeavour was supposed to come home on Monday but was forced to keep circling the globe because of bad weather in Florida.

66.   Even impoverished North Korea claims to have an unmanned satellite circling the globe in praise of its Great Leader.

67.   FEATURE-US-GLOBAL CLIMATE, Research ship circles globe tracking ocean temperatures, ozone hole.

68.   FEATURE-US-GLOBAL CLIMATE, U.S. research ship circles globe tracking ocean temperatures, ozone hole.

69.   Five teams in recent months have tried and failed to become the first to circle the globe in a balloon.

70.   Five teams this winter have tried and failed to become the first to circle the globe in a balloon.