Transportation security : efforts to strengthen aviation and surface transportation security are under way, but challenges remain : testimony before the Committee on Commerce, Science, and Transportation, U.S. Senate / statement of Cathleen A. Berrick.

Portion of title Efforts to strengthen aviation and surface transportation security are under way, but challenges remain
SeriesTestimony ; GAO-08-140 T
Testimony GAO-08-140 T. ^A682308
General noteTitle from title screen (viewed on Nov. 14, 2007).
General note"For release ... October 16, 2007."
General notePaper version available from: U.S. Govt. Accountability Office, 441 G St., NW, Rm. LM, Washington, D.C. 20548.
Bibliography noteIncludes bibliographical references.
Technical detailsMode of access: Internet. Address as of 11/14/07: http://www.gao.gov/new.items/d08140t.pdf ; current access available via PURL.
GPO item number0546-D-01 (online)
Govt. docs number GA 1.5/2:GAO-08-140 T