EXHIBIT 99.1

                       Press Release Dated March 20, 2006



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Media Contacts:
Winnie Lerner
Jessica Liddell
Abernathy MacGregor
212/371-5999


           Motient Corporation Announces Dismissal of Highland Lawsuit
           Motient will continue to pursue its claims against Dondero

March 20, 2006 - Lincolnshire, IL - Motient Corporation (MNCP) today announced
that the Delaware Courts have dismissed the lawsuit filed by Highland against
multiple defendants, including officers and directors of Motient, Tejas
Securities and C&TA, consultant to Motient.

The complaint, which was originally filed on August 16, 2005 by Highland Legacy
Limited, a hedge fund controlled by former Motient Director James D. Dondero,
alleged, among other things, that Motient's directors had breached their
fiduciary duties to Motient, and sought the recovery of fees paid to certain
defendants by Motient.

In dismissing the suit, the Delaware Court ruled that Highland failed to
introduce facts necessary to support its allegations that the defendant
directors of Motient lacked the independence necessary to properly evaluate the
transactions in question, or that the challenged transactions were not a valid
exercise of their business judgment.

In fact, the Court concluded: "Ultimately, the complaint makes generalized
allegations that do not raise a reasonable doubt that the challenged
transactions were the product of due care." The Court also found that Mr.
Dondero's allegation that the board formed an executive committee to exclude him
from the board after he had filed his suits to be false, since that board action
actually preceded Highland's now discredited lawsuit.

"We are extremely pleased by this victory," stated Christopher Downie, Chief
Operating Officer of Motient. "We have long known Mr. Dondero's accusations to
be without merit, and have therefore vigorously defended against them. Examining
his now discredited allegations, it is apparent that not only this, but many of
his other actions as a director were clearly intended for his own pecuniary
benefit at the expense of Motient's shareholders."

Added Downie, "The net result of Dondero's irresponsible behavior has been a
massive distraction to Motient's board and management, and a diminution of
Motient shareholder value. The Company is therefore committed to the seeing
through our own claims against Dondero, to recover damages on behalf of our
shareholders."





According to Motient's Chairman, Steven Singer, "With this particular litigation
resolved, the truth about Mr. Dondero's motives has been shown, and a
significant distraction for our Company has been removed. Motient and its Board
of Directors have been, and will continue to be, focused on executing our
strategic plan and enhancing the long-term value of the Company for all of our
shareholders."

Motient has filed multiple lawsuits against Mr. Dondero. In the suits, Motient
alleges that Dondero, while still a member of Motient's board and in an apparent
scheme to gain control of the company, materially harmed shareholder value by
attempting to manipulate Motient's stock price by leaking non-public and
misleading information. As noted in one of Motient's lawsuits, and as further
detailed in the Form 8-K Motient filed on October 6th, 2005 (which lists over 50
lawsuits that Mr. Dondero has been involved in over just the last few years),
"Dondero has a history of aggressive actions in connection with his
investments... For Dondero, litigation is often an essential component of the
investment strategy."


                                     -more-


About Motient Corporation:

Motient is a nationwide provider of terrestrial wireless data solutions for
Fortune 500 companies and the small to medium size enterprise business market.
Motient provides access to multiple networks platforms, including GPRS, 1XRTT
and its own DataTac Network. Motient simplifies the wireless experience for
application providers, hardware vendors, value added resellers and customers by
offering proprietary applications, one source support and wireless consulting
services that enhance the performance, efficiency and cost-effectiveness of
enterprise wireless networks.

Motient is also the controlling shareholder of TerreStar Networks Inc., a
development-phase satellite communications company, and a minority shareholder
of Mobile Satellite Ventures, LP, an established satellite communications
company. TerreStar and MSV are both in the process of developing next-generation
hybrid networks that plan to provide ubiquitous wireless service by integrating
land-based towers and powerful satellites. These new networks will deliver
services to standard wireless devices everywhere in North America. For
additional information on Motient, please visit the company's website at
www.motient.com.

Motient Corporation and its directors and executive officers may be deemed to be
participants in the solicitation of proxies or consent revocations from
stockholders of Motient. Information regarding the names of Motient's directors,
executive officers and their respective interests in Motient by security
holdings or otherwise is set forth in Motient's proxy statement relating to the
2005 annual meeting of stockholders, which may be obtained free of charge at the
SEC's website at www.sec.gov and Motient's website at www.motient.com.


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Motient Corporation intends to file a Proxy Statement or Consent Revocation
Statement on Schedule 14A with the SEC. Investors and security holders are
advised to read Motient's Proxy Statement or Consent Revocation Statement, when
it becomes available, because it will contain important information. Investors
and security holders may obtain a free copy of the Proxy Statement or the
Consent Revocation Statement on Schedule 14A (when filed) free of charge at the
SEC's website at www.sec.gov. Motient Corporation also will provide a copy of
these materials without charge on its website at www.motient.com.

Statement Under the Private Securities Litigation Reform Act:

With the exception of any historical information contained in this release, the
matters described herein contain forward-looking statements that involve risk
and uncertainties that may individually or mutually impact the matters herein
described, which could cause actual results or revenues to differ materially
from those contemplated by these statements.


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