The father of kidnapped BBC journalist Alan Johnston pleaded on Thursday for his immediate release. Graham Johnston read out a statement addressed to his son at a news conference in London organized as part of a day of public events to press for the release of the reporter, who was abducted at gunpoint in Gaza City on March 12. "I would like to say something to those who are holding you," the elder Johnston said. "You have families. Please think about what this is doing to my family, including in particular the distress and deep, deep concern Alan's mother and sister have had to endure for all these long weeks. "As I have said before - please - let my son go. Now. Today!"