(June 16, 2017, 1:56 PM EDT) -- ALEXANDRIA, Va. — Parties in a securities class action lawsuit against an aerospace and defense company and certain of its current and former executive officers and directors asked a federal judge in Virginia recently to determine whether shareholders have properly pleaded scienter in making their federal securities law claims (Steven Knurr v. Orbital ATK Inc., et al., No. 16-1031, E.D. Va.)....