Advertising `SWAT Teams' Train to Attack Twitter

Feb. 4 (Bloomberg) -- Jon Erlichman reports on how Twitter ads are born. He speaks on Bloomberg Television's "Bloomberg West." (Source: Bloomberg)
How Migrants Built an Economy in Calais' Tent City
19:08 - Amid the hundreds of tents and makeshift shelters of Calais' sprawling migrant camp, a micro economy has emerged. Shops, restaurants and even a nightclub have sprung up, adding a shred of normality to a precarious, and often dangerous, existence. Bloomberg's Tom Mackenzie reports.
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