Further plans to earn a master's degree in moral and political ethics were put on hold after the birth of their second daughter, Memphis Eve, in 1991. Two sons, Elijah Bob Patricus Guggi Q and John Abraham, were born in 1999 and 2001, respectively. Being effectively a single parent while U2 toured was difficult for Hewson, but she now found Bono helpful even at a distance. In late 1985, following U2's participation in Live Aid, Bono and Hewson spent five weeks as aid volunteers in Ajibar during the 1983–1985 famine in Ethiopia. She saw children with no possessions and at risk of death; despite this, to her they appeared more spiritually alive than those in Ireland who had material comforts but seemed spoiled and spiritually unaware. In 1986, the couple travelled to strife-torn areas in Nicaragua and El Salvador on a visit organised by Central American Mission Partners. In 1992, Hewson participated in Greenpeace protests against the Sellafield plant for nuclear reprocessing, located across the Irish Sea in Cumbria, England. She was especially set against the under-construction Thermal Oxide Reprocessing Plant component being opened. She was aboard Greenpeace's MV "Solo" when it staged a publicity-oriented "raid" wherein the band members landed on the beach at the plant in rubber dinghies, but she said she had not been responsible for that particular protest. This involvement led her to become interested in the Chernobyl nuclear disaster of 1986. After a request by activist Adi Roche, she went to blighted, high-radiation exclusion zones in Belarus for three weeks to narrate part of "Black Wind, White Land". The 1993 Irish documentary, shown on RTÉ, highlighted the plight of fallout victims of the Chernobyl event. "Hot Press" magazine wrote that Hewson had "obvious gifts as a presenter, which include a sense of quiet compassion that draws forth the best from the people she talks with." Another reviewer said that the documentary was very effective until she started speaking. Since 1994, Hewson has been a patron of Chernobyl Children's Project International (shortened to Chernobyl Children International in 2010), an organisation founded and run by Roche that works with children, families, and communities that continue to be affected by Chernobyl. Through the years, Hewson has taken at least ten trips to Belarus and other nations in the region despite the risk to her health. She has organised overland aid convoys and sometimes driven ambulances filled with medical supplies herself; in one case she had to retreat quickly when a fire spread in a village a few miles from Chernobyl.