Excerpt: Frank Abangale Jr. forged his first check at age 16 out of a checkbook given to him by his father. Most teens in the ’60s would have been enamored with $25 in their pocket. Abangale had a different idea. He wanted millions, almost obsessively. Sly and sneaky, he worked his way onto airplanes as a co-pilot. He didn’t want to fly but merely take advantage of the banking system that relied on postal services to send checks cross-country.