Although the U.S. Departments of State and Homeland Security recently announced temporary accommodations for travelers who have applied for but have not yet received their passports, U.S. citizens traveling by air to Canada, Mexico, Bermuda and other Caribbean countries must still meet their entry requirements.   Due to longer processing times for passport applications spurred by record-breaking demand, Americans can re-enter the U.S. by air from Canada, Mexico, Bermuda and the Caribbean by presentation of a government issued photo I.D. and Department of State official proof of applicatio...