In peace time, the US government used to spend very little on defense, about one percent of GDP. But that changed after World War II when the United States found itself in a global contest against Communism. Ever since, defense spending has never been less than 3.6 percent of GDP.ut 9/11, the terrorist attack on iconic US buildings in 2001, changed that, and defense spending began a substantial increase in two stages. First, it increased to 4.6 percent by 2005 for the invasion of Iraq, and then to 5.0 percent in 2008 for the the surge in Iraq.
The most noticeable difference is the sensation. A whirlpoolâs water jets come with the classic, high pressure, deep massaging jets that most people have come to associate with hydrotherapy. An air tub, on the other hand, is a more generalized, effervescent feeling.he most noticeable difference is the sensation. A whirlpoolâs water jets come with the classic, high pressure, deep massaging jets that most people have come to associate with hydrotherapy. An air tub, on the other hand, is a more generalized, effervescent feeling.
If you want moving water in your bath, your main choice is between a whirlpool tub and an air tub. Though the two are similarly pampering, it helps to understand the basic differences.In whirlpool tubs, it's the circulation of water--usually by built-in jets and hoses--that provides the massage.Air is mixed in, but water does most of the work. Air baths, on the other hand, force air through tiny holes to create an allover bubbling massage.n whirlpool tubs, it's the circulation of water--usually by built-in jets and hoses--that provides the massage. Air is mixed in, but water does most of the work. Air baths, on the other hand, force air through tiny holes to create an allover bubbling massage.