Despite new travel requirements, more than 2.3 million Americans reentering the country by land or sea from Mexico or Canada failed to produce a passport, birth certificate or other secure document to establish identity and nationality, a government review has found. Most people, including about 500,000 in California, were still allowed to pass through ports of entry without the approved documents or without being transferred to a secondary inspection post for a more in-depth examination, according to the report by the inspector general for the Department of Homeland Security. Many travelers were allowed to pass after undergoing extensive questioning and...