The Transportation Security Administration (TSA) of the US Department of Homeland Security requires us to collect information from you for purposes of watch list screening, under the authority of 49 U.S.C. section 114, and the Intelligence Reform and Terrorism Prevention Act of 2004. Providing this information is voluntary; however, if you don't provide it, you may be subject to additional screening or denied transport or authorisation to enter the post-security area. TSA may share information you provide with law enforcement or intelligence agencies or others under its published system of records notice. For more on TSA Privacy policies, or to view the system of records notice and the privacy impact assessment, visit tsa.gov.
Other changes include: some airports have stopped curb-side baggage check, anything vaguely resembling a knife or lighter may or may not be confiscated (although lighters suddenly stopped being dangerous a year ago), you're sometimes only allowed one carry-on plus a purse, briefcase, diaper bag or the like, non-passengers aren't allowed past security, all passengers must have a document that looks like a boarding pass at most airports to get past security, you may have to put your toothpaste and shampoo in a baggie that may have to be a one quart size, some parking areas close to terminals are closed. But check-in clerks no longer ask you whether you packed your own suitcase.