Who is Christa Mortenson from Three Cups of Tea: One Man's Mission to Fight Terrorism and Build Nations-- One School at a Time and what is their importance? Three_Cups_of_Tea English & Literature Christa Mortenson | Three Cups of Tea: One Man's Mission to Fight Terrorism and Build Nations-- One School at a Time

Greg's younger sister, Christa has a defect from early childhood, possibly a reaction to a vaccination for small pox. Christa spends a great deal of time with Greg prior to her death, which occurs at an early age. It is an effort to honor Christa's memory that first leads Greg to Pakistan. She continues to influence him and Greg often cites his efforts to honor Christa's memory for the positive things he does in his life.