A spokesman for the Dutch Defense Ministry says around 70 Marines, among several hundred based on the island, have already assisted in three search missions.
There have also been countless searches for Natalee Holloway by Aruban investigators and hundreds of resident and tourist volunteers, but they have been unsuccessful.
Holloway vanished May 30, just hours before she was supposed to fly home with classmates following a five-day trip to celebrate their graduation from Mountain Brook High School.
Three men are in custody.
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