31.   Craig Masback, a former miler, is a lawyer in Washington and a television commentator covering track.

32.   He also was clumsy at covering his tracks.

33.   He covered his tracks, prosecutors said, by taking payments in cash, transporting it cross-country in a money vest and then spending it lavishly.

34.   He led secret missions to Europe and the former Soviet Union to acquire bomb technology, carefully covering his tracks to avoid assassination by Israeli agents.

35.   Hijackers make off with the warheads, detonating one of them to cover their tracks.

36.   I had cheated in the past and managed to cover my tracks, but this time was different.

37.   In an effort to cover her tracks, the nurse injected saline back into the vials so they appeared full, Smith said.

38.   In fact, the encryption methods being developed to protect such works may wind up being trumped by encryption devised to cover the tracks of those swapping them.

39.   In particular, teammates and coaches over several seasons have done everything but blow his nose and pack his lunch, making excuses for him and covering his tracks.

40.   It is difficult to get precise figures on the scale of the business because money launderers, by definition, cover their tracks.