91.   Officials caution that the campaign in Afghanistan, which has experienced periods of intense activity followed by periods of halting progress, is likely to continue in this way.

92.   Officials cautioned that much work remains.

93.   One official cautioned that a number of details would have to be worked out before a merger could occur.

94.   One Yemeni official cautioned that the links to bin Laden fell far short of establishing that bin Laden had played any direct role in the attack.

95.   On Thursday officials cautioned about reading too much into the bleak January numbers.

96.   One law-enforcement official Tuesday cautioned that no specific target city or mode of carrying out the bombing had been determined.

97.   Pentagon officials had cautioned that the number could rise.

98.   Other officials cautioned that Roberts might not have survived his fall from the helicopter as it abruptly changed course when it came under fire on Sunday.

99.   Relief officials also cautioned that large gaps remained in assistance for others.

100.   Russian officials cautioned that these reports might be a rebel effort to deceive Moscow.