John Bolton, Kori Schake, Mark Krikorian, Gordon Chang

JOHN BOLTON, former Under Secretary of State for Arms Control and International Security, outlines the arms control enterprise and Russia's recent violations of the New START treaty.

KORI SCHAKE, of the Hoover Institution, explores the issues about US involvement in Afghanistan that Robert Gates has raised in his new book.

MARK KRIKORIAN of the Center for Immigration Studies shares some of the possible implications of the immigration agenda decided on at the recent Republican retreat.

GORDON CHANG, of Forbes.com, sheds light on the security threats that could arise should Chinese computer company Lenovo—currently buying up IBM technology—become another Huawei in scope and power.