Russia sent an advanced missile system to Syria.
Belgium said it faced a serious and imminent threat of a Paris-style attack.
"The macabre imagination of those giving the orders is unlimited."
Abdelhamid Abaaoud is a Belgian national currently in Syria.
Officials looking to question previous occupant of apartment.
U.N. group warns against rejecting or blaming refugees after Paris attacks.
To grapple with migrant influx; marks first border controls in two decades.
U.N. official called suggested reductions "counter-productive."
President François Hollande stated, "I solemnly promise you all that France will do everything to defeat the army of fanatics who have committed these crimes, that she will act tirelessly to protect her children."
Tensions continue to rise between the two countries.
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