in the front line• Or his practice of filmingin the front line, and even beyond the front line?• They were sitting in the front line of chairs.• It would be like having all our soldiersin the front line at the same time.• She is trappedin the front line on the killing streets of Western Sarajevo.• We really were in the front line.
in/on the front line• He argued that these were the people on the front line.• They were sitting in the front line of chairs.• Then they started on the front line of police.• She is trappedin the front line on the killingstreets of Western Sarajevo.• Not so much the opposition - what shook me up was to see children being used in the front line by protestors.