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In this photo released by the Syrian official news agency SANA, shows Syrian government troops walk inside the Kweiras air base, east of Aleppo, Syria, Wednesday, Nov. 11, 2015. Syrian government forces broke a siege imposed by the Islamic State group on the northern military air base of Kweiras since 2013. The international community is mounting its most serious effort yet to end the nearly five-year-old Syrian war, rallying around a second round of talks in Vienna this week amid the emergence of a Russian proposal that calls for early elections. (SANA via AP)
In this photo released by the Syrian official news agency SANA, shows Syrian government troops walk inside the Kweiras air base, east of Aleppo, Syria, Wednesday, Nov. 11, 2015. Syrian government forces broke a siege imposed by the Islamic State group on the northern military air base of Kweiras since 2013. The international community is mounting its most serious effort yet to end the nearly five-year-old Syrian war, rallying around a second round of talks in Vienna this week amid the emergence of a Russian proposal that calls for early elections. (SANA via AP)

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Fmr. Congresswoman: We need to up our game in fight against ISIS

Former Congresswoman Jane Harman tells Jake Tapper that investigators are 99.9% certain a bomb brought down a Russian Metrojet flight, and it's "plausible" ISIS could have done it.

Fmr. Congresswoman: We need to up our game in fight against ISIS

Former Congresswoman Jane Harman tells Jake Tapper that investigators are 99.9% certain a bomb brought down a Russian Metrojet flight, and it's "plausible" ISIS could have done it.