Why Change It?

After September 11^th the threat level chart below was created. My question is simple…why not have the threat level at the highest alert at all times? Is it not wise to have everyone on their toes to keep another catastrophic event from happening again? We owe it to ourselves and to our country to always be on alert and do what is necessary to protect us and our travels. Not only that who knows which color means what, we don’t carry around the chart in our wallets.