With the recent outrage over the Obama administration having the NSA spy on American citizens through its PRISM program, you might want to refer to the Constitution and check the Bill of Rights (4th Amendment, to be exact). The Constitution, Declaration of Independence, and other references are all available in the Dictionary app for OS X.
What you will need to have enabled is the New Oxford American Dictionary. You can enable it by going to Dictionary>Preferences.
Next, go to Go>Front/Back Matter>New Oxford American Dictionary. Alternatively, enter “(front/back matter)” into the search field. When you scroll down, you will find many different resources, including the Constitution.
Click that, and scroll down to the Amendments section. Here you will find all the Amendments to the Constitution, including the 4th Amendment, which states
“The right of the people to be secure in their persons, houses, papers, and effects, against unreasonable searches and seizures, shall not be violated, and no Warrants shall issue, but upon probable cause, supported by Oath or affirmation, and particularly describing the place to be searched, and the persons or things to be seized.”