used. The Secret Service intends to use the buses as a general asset, and they are not specifically dedicated to the President. As such, the second bus was used in a similar fashion by the Secret Service during the 2012 presidential campaign to transport Mitt Romney. This second bus is now held by the Secret Service as a backup vehicle. The Secret Service will not confirm details about the construction and appointment of the buses, but it is likely that they are extensively equipped with security and communication equipment. They are speculated to be similar to other presidential conveyances, such as The Beast. If so, they are heavily armored, pressurized, and built to withstand a chemical or rocket-propelled grenade attack. The buses are reported to have lavish interiors similar to those provided to entertainment celebrities. They are similar in size to standard Greyhound buses, with black exteriors, blacked-out windows, and police lights. During the August, 2011 campaign event, the bus provoked considerable interest and commentary in the news and blogosphere. The LA Times reported a comparison of the bus to Darth Vader's helmet. Tea Party activist and CNN commentator Dana Loesch called the bus "a big, black, hearsemobile of doom." References Bus companies of the United States Companies based in Nashville, Tennessee