51.   During initial questioning, investigators learned that al-Hajj worked for several Islamic institutions that collect money for unspecified groups in the camp, Addoum said.

52.   Fears about chemical or biological attacks surfaced after investigators learned that one of the hijackers had sought information about crop-dusting planes in Florida.

53.   His story began to fall apart when investigators learned that other women who had relationships with him had also met violent deaths.

54.   Investigators learned about the alleged smuggling ring by tapping the phones of mobsters in Catania, the ANSA agency reported.

55.   Investigators learned during a fingerprint check that he was wanted in New York under the name Joseph Scudiero, and Scudiero fled again, avoiding capture until Friday.

56.   Investigators learned that Bishop had been prescribed Accutane, a powerful acne medication which has been under federal investigation for its links to suicide and depression.

57.   Investigators learned that when the doors were raised to the open position, sliding panels above them moved inward and could chafe the electrical wiring in those areas.

58.   Investigators learned about the alleged smuggling ring by tapping the phones of mobsters in Catania.

59.   Murphy, a retired telephone company employee, was linked to the incidents when investigators learned that he had been a patient of every doctor whose office was targeted.

60.   Safety board investigators learned of it only when journalists asked about reports they had heard.