This undated photo shows Scott and Jean Adam, two of the Americans killed by pirates.
In this June 11, 2005 file photo provided by Joe Grande, Phyllis Macay and Bob Riggle are seen on a yacht in Bodega Bay, Calif. The couple was among hostages killed by pirates off Somalia's coast.
Feb. 22, 2011: Monsignor Lloyd Torgerson holds a special prayer at the end of mass at the altar of St. Monica's church for Scott and Jean Adam. The couple recently visited the church this December.
Feb. 22, 2011: At the 6:30 a.m. mass at St. Monica's church in Santa Monica, Calif., the congregation lit a candle for the Adam couple who was killed by Somali pirates after being held hostage since Friday.
Feb. 22, 2011: Worshipers gather to pray in Santa Monica, Calif., for the Adam couple who was slain by Somali Pirates. Jean and Scott Adam had recently visited their church this December before returning on their voyage around the world.
Feb. 22, 2011: Msgr. Lloyd Torgerson, second from right, joins parishioners for a special prayer during morning Mass for two members, Jean and Scott Adam, and their two companions slain by Somali pirates who seized their yacht off East Africa, at St. Monica's Roman Catholic Church in Santa Monica, Calif.
Feb. 22, 2011: Msgr. Lloyd Torgerson embraces an unidentified parishioner after a special prayer for two members, Jean and Scott Adam, and their two companions, all slain by Somali pirates who seized their yacht off East Africa, at morning Mass at St. Monica's Roman Catholic Church in Santa Monica, Calif.
Four Americans aboard a yacht hijacked by Somali pirates have been killed, marking the first time U.S. citizens have been killed in a wave of pirate attacks plaguing the Gulf of Aden and the Indian Ocean for years.