 Enjoy your summer vacation. This is Dr. Tim Pearson for the Midwest Today Radio Edition. Thanks, Dr. Tim. As Hal Borland writes, summer is misted dawns and searing afternoons, warm nights, thunderstorms crackling their whips. Summer is shirt sleeves, sunburn, bathing suits, tall, cold drinks, dazzling beaches and shimmering lakes. Summer is the green countryside, the cool fragrance of mountain pines.