Condemning the terror attacks in Paris and Beirut, West Bengal Chief Minister Mamata Banerjee on Saturday described terrorism as the world's biggest enemy."Innocent lives lost in Paris and Beirut. Terrorism is the world's biggest enemy. Condolences to the families of innocents killed," Banerjee, also the Trinamool Congress chairperson, said on Twitter.While at least 153 people were killed in the French capital as terrorists carried out a bloody Mumbai-style multiple terror attacks on Friday, the attack on Thursday in Beirut, left at least 43 dead and 240 others injured.