Communication Ties News Today

>> reporter: authorities have not yet confirmed communication ties between isis and the shooters. a full fbi investigation continues. joining me tonight, steve clemens, msnbc contributor, editor at large for "the atlantic" magazine. here we have an after the fact, hey, these are our guys. is this claim from isis steve, legitimate or a publicity stunt? >> well its legitimate in the sense that isis called for a global activity by people to take up the knife, to go after american soldiers american ...