51.   Riefenstahl has covered her tracks well.

52.   Rusnak had already taken steps to cover his tracks with fictitious trades that the counterparties were unaware of.

53.   Secret bank accounts that let terrorists cover their tracks have long been an impediment to authorities hot on the scent of operatives.

54.   Some of these women, it was discovered, did not meet the scientific criteria, but Poisson enrolled them anyway and faked certain information to cover his tracks.

55.   Some military analysts and specialists on the weapons trade say the CIA has spent years covering its tracks on its early ties to the Afghan forces.

56.   The bomber, who had meticulously covered his tracks for nearly a decade, had made a mistake.

57.   The Guatemalan defense ministry represents a brutal military culture that is trying to cover its tracks in the hope that the Harbury embarrassment will fade away.

58.   The government argued that Welch and Johnson broke federal bribery and fraud laws and that they covered their tracks with sham accounting and secrecy.

59.   The members of the ring were sophisticated enough to cover their tracks in cyberspace and within the computer systems.

60.   The movie is smart enough to cover its tracks.