The United States is opening a new website which is the “Official Travel and Tourism Website of the United States.” The site, which is set to go live some times this month, will provide information on U.S. destinations, attractions, and official travel information.
Although before the site opens those in charge may want to consult a [...]

According to safetravel.dot.gov:

Effective January 1, 2008, the following rules apply to the spare lithium batteries you carry with you in case the battery in a device runs low:

Spare batteries are the batteries you carry separately from the devices they power. When batteries are installed in a device, they are not considered spare batteries.
You may not [...]