71.   In Iowa, though, ethanol plays a critical role in the agricultural economy.

72.   In the capital, pro-government forces tightened security on the streets, mindful that infiltrators played a critical role last year in the near-fall of Freetown.

73.   In the end, though, international opinion, especially if it remains relatively muted, may not play a critical role in deciding the outcome of this fight.

74.   In this regard, no one has sparked more surprise than Mitchell, who was mentioned as having a critical role in getting all sides to the negotiating table.

75.   It could play a critical role in treating -- or even curing -- some of the most serious diseases afflicting Americans today.

76.   It is also important, playing a critical role in a wide variety of commercial applications like inkjet printing, pesticide spraying and DNA analysis.

77.   It is an economy that is increasingly dependent on knowledge and intangible assets, and technology plays a critical role in that.

78.   Junior strong safety George White and junior free safety Pedro Cirino are expected to play critical roles in run support.

79.   Kinases play a critical role in controlling the growth, activation and differentiation of cells.

80.   More broadly, he should be reminding Americans of the critical role played by the judiciary in protecting individual rights, even when decisions are unpopular.