Richard Preston with his wife Wendy in Italy. Richard Preston, 49, was diagnosed with a deadly brain tumor in 2013 and was given just 10 months to live. But he refused to give up on life, and endured a risky five-and-a-half hour operation and 11 months of grueling chemotherapy. He and his wife have visited 15 countries on a world tour and plan to visit three more to capture a lifetime's worth of memories. [Photo: IC]"

Richard Preston with his wife Wendy in China. Richard Preston, 49, was diagnosed with a deadly brain tumor in 2013 and was given just 10 months to live. But he refused to give up on life, and endured a risky five-and-a-half hour operation and 11 months of grueling chemotherapy. He and his wife have visited 15 countries on a world tour and plan to visit three more to capture a lifetime's worth of memories. [Photo: IC]"

Richard Preston with his wife Wendy in Paris. Richard Preston, 49, was diagnosed with a deadly brain tumor in 2013 and was given just 10 months to live. But he refused to give up on life, and endured a risky five-and-a-half hour operation and 11 months of grueling chemotherapy. He and his wife have visited 15 countries on a world tour and plan to visit three more to capture a lifetime's worth of memories. [Photo: IC]"

Richard Preston with his wife Wendy at the Great Wall of China. Richard Preston, 49, was diagnosed with a deadly brain tumor in 2013 and was given just 10 months to live. But he refused to give up on life, and endured a risky five-and-a-half hour operation and 11 months of grueling chemotherapy. He and his wife have visited 15 countries on a world tour and plan to visit three more to capture a lifetime's worth of memories. [Photo: IC]"

Richard Preston with his wife Wendy in China. Richard Preston, 49, was diagnosed with a deadly brain tumor in 2013 and was given just 10 months to live. But he refused to give up on life, and endured a risky five-and-a-half hour operation and 11 months of grueling chemotherapy. He and his wife have visited 15 countries on a world tour and plan to visit three more to capture a lifetime's worth of memories. [Photo: IC]"