Destroyer USS McFaul followed Panamanian vessel as it headed toward Somalia . M/ AFP - Getty Images U.S. ship commander putting off rescue attempt out of concern for captives ' safety .
Destroyer USS McFaul followed Panamanian vessel as it headed toward Somalia . M/V Iceberg and crew of 24 are held by 50 pirates . U.S. ship commander putting off rescue attempt out of concern for captives ' safety .