FDA proposes broad rules for e cigarettes FDA Enforcement Blitz Combats Underage Use of Cartridge Based E Cigarettes and Threatens to Sack Premarket Review Compliance Policy and Flavors The Continuum of Risk FDA warns retailers against illegal sale of e cigarettes to children PBS News FDA clears first menthol e cigarette for adults Juul e cigarettes win FDA authorization, sources say F.D.A. Opens Door to More Flavored E Cigarettes The New York Times