They would sit around the fire and hang out for two, three hours without saying a word.

他们围坐在篝火边两三个小时，一句话也没说。

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"It became clear to us that we had in our hands a technology that could be exploited by emergency responders and firefighters at a fire scene to see through smoke without being blinded by flames, a limitation of existing technology, " Ferraro says.

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Withdrawing from Syria would ensure the safety of the team, but it could signal a loss of confidence in the hopes of a cease-fire and leave the U.N. without a way to monitor progress, the report says.

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