WASHINGTON – The threat posed to the national security of the United States by Iran was likened only to the one posed by Nazi Germany in the 1930s, by former House Speaker Newt Gingrich, who suggested Tehran could be planning for a pre-emptive nuclear electromagnetic pulse attack on America that would turn a third or more of the country "back to a 19th century level of development." Gingrich made the stunning statements, which echo warning of other congressional leaders and national security experts, in testimony before a subcommittee of the Senate Homeland Security and Governmental Affairs Committee last week.