On ABC’s This Week today, Representative Mike Rogers, chairman of the House intelligence committee, said that he is aware of non-public information strengthening the case presented this week, “with varying degrees of confidence,” that chemical weapons have been used in Syria.

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“There is also classified information we have that I think strengthens the case” that there has been chemical-weapons use in Syria “over the past two years,” Rogers said. For now, the public information comes from labs in Europe and the U.S. that have examined physiological evidence from Syria and found exposure to sarin gas.