Nation

From Harvard Law to legal architects of war on terror

From left: John Carlin, the assistant attorney general for national security; Rajesh De, chief lawyer for the National Security Agency; and Adam Szubin, director of the Department of the Treasury’s Office of Foreign Assets Control, have been friends since their days at Harvard Law School.
John Boal for The Boston Globe
From left: John Carlin, the assistant attorney general for national security; Rajesh De, chief lawyer for the National Security Agency; and Adam Szubin, director of the Department of the Treasury’s Office of Foreign Assets Control, have been friends since their days at Harvard Law School.

WASHINGTON — When Rajesh De, the chief lawyer for the National Security Agency, needs a special court order so the agency can spy on potential security threats, he turns to John P. Carlin and his team of attorneys in the Justice Department to advocate for the new authority.

But De doesn’t always get what he wants from his former Harvard Law School roommate.

In a twist of fate they could hardly have predicted a decade and a half ago in Cambridge, they along with another friend from the Class of 1999 are now among the most influential legal minds in the nation’s war on terrorism. Their mission is to strike one of the most weighty — and controversial — balancing acts of the Obama administration: fighting terrorism while protecting the civil liberties of Americans.

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It is a far cry from their theoretical debates in law school. Their decisions have direct implications on how much the federal gov-ernment spies on its residents in the name of security. And compatriots or not, what one friend is seeking, the other sometimes declines.

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“If we have questions and we think it is insufficient probable cause, it is our job to say no and not just throw it to the court,” said Carlin, the assistant attorney general for national security. “If we don’t get it right and hold ourselves to a higher standard, then you can make mistakes.”

Another key partner is their other close friend and former classmate, Adam Szubin, the Treasury Department official responsible for cutting off the flow of money to terrorist groups.

The trio, now in their early 40s, have a unique relationship. They often finish each other’s sentences. Their wives socialize — De and Carlin met their spouses in Cambridge — and Carlin and Szubin live in the same neighborhood. When they get together, they often reminisce about the drab green house where De and Carlin lived on Roberts Road and their favorite pizza shop.

But their professional interaction could scarcely be more serious.

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De became general counsel of the NSA in 2012, not long before the agency came under intense scrutiny after disclosures by former contractor Edward Snowden about its gathering of bulk personal data of US citizens and other programs.

When he needs authorization for an eavesdropping operation, De explained, it is his former housemate Carlin who “helps us to get the authority to collect the information.”

That means Carlin, or one of his staff of lawyers, represents the NSA before a secret court set up by the Foreign Intelligence Surveillance Act, or FISA.

But Carlin, who took on his post early this year, also has a responsibility to assess whether the subject of the NSA request is legitimate.

“When we go to the FISA court, unlike if I were a defense attorney representing an individual client, I shouldn’t push to the line,” he explained.

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If Szubin, who has been director of the Department of the Treasury’s Office of Foreign Assets Control since 2006, wants to sanction a foreign country, company, or individual for financing terrorism, he has to coordinate with his old friend De, including getting permission to use highly classified material gathered by the NSA to designate an entity as a supporter of terrorism.

It all comes full circle if the sanctions are violated, added Carlin. “They may be criminally prosecuted, and we bring a prosecution.”

The friends’ unique personal ties have broken down bureaucratic barriers between their respective agencies, they say.

From left, Rajesh De, General Counsel for the National Security Agency, John Carlin, Assistant Attorney General for National Security, and Adam Szubin, Director of office of Foreign Assets Controls, in the Main Library at the Robert F. Kennedy building on Saturday, December 3, 2014. The three were friends when they attended Harvard Law, graduating in 1999. (John Boal for The Boston Globe)
John Boal for The Boston Globe
De (left), Carlin (center), and Szubin.

“You can be fully blunt and not worry about offending someone,” said Carlin. “You still try to see if you can work to resolve it, but sometimes you just end up in a difference place.”

Indeed, they insist their legal views are not always in sync about where counterterrorism ends and personal freedoms begin.

“Think how weird it would be if we did agree,” added De. “I think that would be more alarming.”

He said the three friends make a conscious effort to avoid “group think” and try to challenge each other’s positions.

What they all agree on is that none anticipated working in what before the Sept. 11, 2001, attacks was considered something of a legal backwater: national security law.

De initially focused on international human rights law, and when he joined the Justice Department he landed a job in the antitrust division.

Carlin gravitated toward criminal law and represented indigent clients in Roxbury and Dorchester during law school. When he went to work for the Justice Department with De, he joined the tax division (the pair also lived together their first year in Washington).

Szubin, meanwhile, was interested in constitutional law, particularly religious and press freedoms, and went to work defending the government against civil lawsuits.

“I would have been stunned if you told me [back then] I’d be doing this today,” Szubin said.

It was only after the 9/11 attacks that they were drawn into the fight themselves.

“I felt like I wanted to contribute in a different way,” recalled De.

Szubin soon found himself defending the office he now runs against a lawsuit filed by three Islamic charities that were sanctioned after 9/11 for funding terrorist groups. Carlin said he was inspired in part by what De and Szubin were doing; by 2007 he was working for then-FBI director Robert Mueller.

Though operating mostly in the background, all three now play critical roles in ensuring that in its zeal to prevent another 9/11 the federal government doesn’t go too far.

De has spent much time dealing with the fallout from Snowden’s disclosures about the NSA’s intelligence-gathering programs and methods. To critics of the agency’s methods, he insists that the NSA is a “highly regulated entity” — including by his old roommate.

He said the big question they wrestle with is a fundamental one: “How can you ensure that you are staying within the zone of what an average, reasonable person would expect of their government: to keep them safe but try to pre-serve a reason for keeping them safe, which is their fundamental freedoms.”

The answer isn’t easy to come by, he bluntly acknowledged. “At the end of the day, there is no objectively right answer.”

So he consults — and argues — with his former classmates about it. Just like the old days.

Bryan Bender can be reached at bender@globe.com. Follow him on Twitter @GlobeBender.