51.   Ms. Chen filmed additional scenes at a movie studio in Shanghai, working at night to avoid detection.

52.   Often, names were changed to avoid detection by drug-company monitors.

53.   Officials say the Zhawar Kili complex is now destroyed, but they have privately expressed fears of other subterranean bunkers that have avoided detection.

54.   Racers have also perfected their security to avoid detection, Walker said.

55.   Refugees who manage to avoid detection until they make land are being held at the Krome Detention Center outside Miami.

56.   Some types mimic biological viruses to avoid detection.

57.   So, to avoid detection, the guys must disguise themselves all through the voyage as stewards, buxom women, etc.

58.   Some pray openly in churches with neon signs, while others change their meeting places constantly to avoid detection.

59.   Submarines already can communicate externally, of course, though their need to avoid detection poses restrictions.

60.   The four men traveled to Turkey, each by a different route, to avoid detection.