There is no news media in the U.S. if this manual is authentic, and so far there is no reason to believe it is not.  Posted at Global Security (not to be confused with Global Research, the site given to occasional poorly substantiated conspiracies.)  Global Security is a reputable site of military and former military policy wonks.  The manual is a how-to for the Army in case of mass internments resulting from unstated causes.  "Political activists" and "malcontents" are among the enemy.  

The "Internment/Resettlement Operations" field manual title page is dated February 2010.

pdf at PublicIntelligence.net

FM 3-19.40: MILITARY POLICE INTERNMENT/RESETTLEMENT OPERATIONS

3-56. The PSYOP team also supports the military police custodial mission in the I/R facility. The team—

- Develops PSYOP products that are designed to pacify and acclimate detainees or DCs to accept U.S. I/R facility authority and regulations.

- Gains the cooperation of detainees or DCs to reduce the number of guards needed.

- Identifies malcontents, trained agitators, and political leaders within the facility who may try to organize resistance or create disturbances.

- Develops and executes indoctrination programs to reduce or remove antagonistic attitudes.

-  Identifies political activists.

- Provides loudspeaker support (such as administrative announcements and facility instructions when necessary).

- Helps the military police commander control detainee and DC populations during emergencies.

- Plans and executes a PSYOP program that produces an understanding and appreciation of U.S. policies and actions.

Whoa.  Wouldn't every news organization on the planet be all over this, at least in a debunk mode, if they had a pulse?  

From the Preface:

Preface

Field manual (FM) 3-39.40 is aligned with FM 3-39, the military police keystone FM. FM 3-39.40 provides guidance for commanders and staffs on internment and resettlement (I/R) operations. This manual addresses I/R operations across the spectrum of conflict, specifically the doctrinal paradigm shift from traditional enemy prisoner of war (EPW) operations to the broader and more inclusive requirements of detainee operations.

Additionally, FM 3-39.40 discusses the critical issue of detainee rehabilitation. It describes the doctrinal foundation, principles, and processes that military police and other elements will employ when dealing with I/R populations. As part of internment, these populations include U.S. military prisoners, and multiple categories of
detainees (civilian internees [CIs], retained personnel [RP], and enemy combatants), while resettlement operations are focused on multiple categories of dislocated civilians (DCs).  Military police conduct I/R operations during offensive, defensive, stability, or civil support operations.

Despite a sophisticated campaign to make Americans believe that NDAA indefinite military detention does not apply to US citizens, state houses like the Virginia Legislature agree that it does, and are passing laws to blunt the authority of NDAA by prohibiting National Guard and state police agencies from cooperating with the feds in such matters.  Section 1021 (changed to section 1031 in final bill) reads:
(e) AUTHORITIES.—Nothing in this section shall be construed to affect existing law or authorities relating to the detention of United States citizens, lawful resident aliens of the United States, or any other persons who are captured or arrested in the United States.
But "Existing law" is the Fourth Circuit Appeals Court decision in Jose Padilla, a U.S.-born citizen whom Fourth Circuit affirmed could be held indefinitely by the military under the Bush administration without charge or trial. Sen. Lindsey Graham, one of the main sponsors of the bill, said explicitly on the Senate floor that the law was intended to, and does, apply to US citizens.  Graham interprets the Fourth Circuits upholding of the Padilla detention "the law of the land."

Moreover, the issue of the NDAA applying to American citizens was pretty much settled when Obama admitted in his signing statement that he had the power, but would not use it:

“I want to clarify that my Administration will not authorize the indefinite military detention without trial of American citizens."
Which bring us back to the Army Field Manual: Is this treasonous document authentic?  

The New Yorker's Jane Mayer described how an institutional attitude had been put in place during the Bush administration to deal with anyone deemed "enemy combatant" and outside the law.  Quoting a report issued by the Parliamentary Assembly of the Council of Europe, titled “Secret Detentions and Illegal Transfers of Detainees,' Mayer describes how detainees were “taken to their cells by strong people who wore black outfits, masks that covered their whole faces, and dark visors over their eyes.”

Mayer writes that a former member of a C.I.A. transport team has described the “takeout” of prisoners as:

   “a carefully choreographed twenty-minute routine, during which a suspect was hog-tied, stripped naked, photographed, hooded, sedated with anal suppositories, placed in diapers, and transported by plane to a secret location.”
A person involved in the Council of Europe inquiry said, “It was used to absolutely strip the detainee of any dignity. It breaks down someone’s sense of impenetrability.”

This site is supposed to have a mainline to the White House, as an unabashedly Democrat, for and by Democrats website, as it has every right to be.  One question on the field manual, Mr. President: Is this true?

White House contact.

"I, __ (SSAN), having been appointed an officer in the Army of the United States, as indicated above in the grade of __ do solemnly swear (or affirm) that I will support and defend the Constitution of the United States against all enemies, foreign and domestic..." - Oath sworn by U.S. military officers
the accused shall enjoy the right to a speedy and public trial, by an impartial jury of the State and district wherein the crime shall have been committed, which district shall have been previously ascertained by law, and to be informed of the nature and cause of the accusation; to be confronted with the witnesses against him; to have compulsory process for obtaining witnesses in his favor, and to have the Assistance of Counsel for his defence...  - Sixth Amendment of the United Sates Constitution.
This Constitution...shall be the supreme law of the land; and the judges in every state shall be bound thereby... - Article 6, Clause 2 of the U.S. Constitution, the "Supremacy Clause"