### 6400 Federal Register / Vol. 78, No. 20 / Wednesday, January 30, 2013 / Notices

involve extensive discussion of trade secrets and proprietary commercial information that is privileged and confidential, and will discuss law enforcement investigative techniques and procedures. The agenda will include updated committee reports, a global threat overview, and other matters relating to private sector security policies and protective programs and the protection of U.S. business information overseas.

For more information, contact Marsha Thurman, Overseas Security Advisory Council, U.S. Department of State, Washington, DC 20522–2008, phone: 571–345–2214.

Dated: January 15, 2013. Gentry O. Smith, Director of the Diplomatic Security Service, Acting, U.S. Department of State. [FR Doc. 2013–01987 Filed 1–29–13; 8:45 am] **BILLING CODE 4710–24–P**

**DEPARTMENT OF TRANSPORTATION Federal Aviation Administration**  **Twenty Third Meeting: RTCA Special Committee 203, Unmanned Aircraft**  **Systems**
**AGENCY :**  Federal Aviation Administration (FAA), U.S. Department of Transportation (DOT) **ACTION :**  Meeting Notice of RTCA Special Committee 203, Unmanned Aircraft Systems.
**SUMMARY :**  The FAA is issuing this notice to advise the public of the twenty third meeting of RTCA Special Committee 203, Unmanned Aircraft Systems. **DATES :**  The meeting will be held February 12–15, 2013, from 9:00 a.m.to 5:00 p.m. **ADDRESSES :**  The meeting will be held at RTCA, Inc., 1150 18th St. NW., Suite 910, Washington, DC 20036. **FOR FURTHER INFORMATION CONTACT :**  The RTCA Secretariat, 1150 18th Street NW., Suite 910, Washington, DC 20036, or by telephone at (202) 833–9339, fax at (202) 833–9434, or Web site at http:// www.rtca.org. **SUPPLEMENTARY INFORMATION :**  Pursuant to section 10(a)(2) of the Federal Advisory Committee Act (Pub. L. 92– 463, 5 U.S.C., App.), notice is hereby given for a meeting of Special Committee 203. The agenda will include the following: Tuesday, February 12, 2013 Opening Plenary Session

• Introductory Remarks and Introductions • Approval of Twenty Second Plenary Summary

• Chair & Leadership Updates

• Designated Federal Official (DFO) Update

• Workgroup Updates

• Plenary Adjourns until Friday

• Information Briefings Mid-Morning/Afternoon Workgroup Breakout Sessions

• System Engineering Workgroup

• Human Factors Subgroup

• C&C Workgroup

• S&A Workgroup

• Safety Workgroup Wednesday, February 13 & Thursday, February 14 All Day—Workgroup Breakout Sessions

• System Engineering Workgroup

• C&C Workgroup

• S&A Workgroup

• Safety Workgroup Friday, February 15 08:00–11:00 a.m.—Workgroup Breakout Sessions

• System Engineering Workgroup

• Human Factors Subgroup

• C&C Workgroup

• S&A Workgroup

• Safety Workgroup 11:00 a.m. Plenary Reconvenes

• Workgroup Back Briefs

• Other Business

• Date, Place, and Time for Plenary Twenty Four

• Plenary Adjourns 12:00 p.m.

• Workgroup Breakouts TBD by each Workgroup

Attendance is open to the interested public but limited to space availability. With the approval of the chairman, members of the public may present oral statements at the meeting. Persons wishing to present statements or obtain information should contact the person listed in the **FOR FURTHER INFORMATION CONTACT**  section. Members of the public may present a written statement to the committee at any time.

Issued in Washington, DC, on January 16, 2013. Richard F. Gonzalez, Management Analyst, Business Operations Group, ANG–A12, Federal Aviation Administration. [FR Doc. 2013–02030 Filed 1–29–13; 8:45 am] **BILLING CODE 4910–13–P DEPARTMENT OF TRANSPORTATION** 
**Federal Aviation Administration Results of FAA Nitrous Oxide BLEVE**  **Characterization Testing**

**AGENCY :**  Federal Aviation Administration (FAA), DOT.
**ACTION :**  Notice of public teleconference.

**SUMMARY :**  This notice announces a public teleconference to share with the public results of recent FAA sponsored testing of nitrous oxide (N2O) characteristics. Nitrous oxide is an important oxidizer to developers of some commercial reusable launch vehicles. A potential hazard in nitrous oxide storage and handling is a Boiling Liquid Expanding Vapor Explosion (BLEVE), which results from a sudden loss of pressure in a tank containing nitrous oxide stored under pressure above its normal boiling point. The FAA’s Office of Commercial Space Transportation sponsored tests of liquid-phase nitrous oxide at NASA’s White Sands Test Facility to empirically determine the superheat limit temperature for nitrous oxide, and to demonstrate that a BLEVE would not occur if the liquid is maintained at temperatures below this superheat limit temperature.

Meeting Information: The teleconference is scheduled for Thursday, February 28, 2013, from 1:00–2:30 p.m. Eastern Standard Time. The presentation and call-in number will be posted one week in advance at http://www.ast.faa.gov/

. **FOR FURTHER INFORMATION CONTACT :**  Stewart Jackson, Division Manager, Regulations and Analysis Division, AST–300, Office of Commercial Space Transportation, Federal Aviation Administration, 800 Independence Avenue SW., Washington, DC 20591, Telephone (202) 267–7903, or email at stewart.jackson@faa.gov.

Issued in Washington, DC, on January 22, 2013. George C. Nield, Associate Administrator for Commercial Space Transportation. [FR Doc. 2013–02046 Filed 1–29–13; 8:45 am] **BILLING CODE 4910–13–P**