After studying history's biggest crashes, Andrew Ross Sorkin tells us what parallels he sees between 1929 and today's stock market frenzy

Walking up to The Plaza Hotel's east side entrance, Andrew Ross Sorkin is in his element. Just seconds after his arrival, he dives into what the storied hotel was like a century ago, sending me scrambling to get my recorder out. "In 1929, people would come here and it was insane — every business guy would be here and they would all sort of gawk at each other," he gushes. "You remember the famous Four Seasons, where people would have lunch in the '80s and '90s? This was like that." The Plaza is one of th ...