Cindy McCain announced Thursday that she is stepping down as head of the World Food Programme, citing health issues and saluting the work as "the honor of a lifetime." "I had truly hoped I could finish out my term, but my health has not recovered to a level that allows me to fully serve the enormous demands of this job," McCain, 71, said in a statement. "This is one of the most difficult decisions I have ever had to make." McCain has served as the executive director of the humanitarian organization, which provides food assistance to more than 100 million people around the world. The widow of Sen. John McCain, R-Ariz., she made the decision experiencing in October what her office described as a mild stroke. She resumed her role after weeks of recuperation. "I’ve seen firsthand WFP’s ability to save lives in the most dangerous, destitute, and remote locations of the world, where people need us the most," McCain said in a statement.…