21.  First use of an automobile in an inaugural parade.

22.  He theorizes that the first use of metal, in the fourth millennium B.C., was for decorative buttons.

23.  His first use of the line-item veto came in August, when he struck three items, including a provision involving Medicaid financing for New York state.

24.  In an obvious delaying tactic, the Chinese want the treaty to contain security assurances for non-nuclear states, including a commitment to no first use of nuclear arms.

25.  In some weird way, geocachers are pioneers, making up the rules as they dabble with this first frivolous use for a serious technology.

26.  It does not dwell on the aftermath of the first use of a nuclear weapon.

27.  India has said it will not make first use of its nuclear weapons.

28.  It is the first use of the foam outside a laboratory on areas contaminated with a biological weapon.

29.  It also saw the parties for the first time use millions of dollars in soft money to conduct TV campaigns against specific congressional candidates.

30.  It was also the first use of bathing costume.