navy tobacco policy suspends electronic nicotine delivery systems (ENDS) on ships, subs, aircraft Navy Tells Sailors To Leave

Under the Directive, tobacco products include pipe tobacco, roll-your-own tobacco, smokeless tobacco, cigarettes, cigars, cigarillos, waterpipe tobacco, and novel tobacco products

(Alan Warren/The Messenger-Inquirer via AP) Captions are provided by our contributors

However, tobacco-free herbal cigarettes currently exist in a regulatory grey zone, escaping many of these controls

Nature 379 : 733736 Freedman R, Coon H, Myles-Worsley M, Orr-Utreger A, Olincy A, Davis A, Polymeropoulos M, Holik J, Hopkins J, Hoff M, Rosenthal J, Waldo MC, Reimherr F, Wender P, Yaw J, Young DA, Breese CR, Adams C, Patterson D, Adler LE, Kruglyak L, Leonard S, Byerley W

Genome-wide insertional mutagenesis of Arabidopsis thaliana