Certain environments (critical infrastructure, DoD, the intelligence community) should move to multiple platforms just to increase the number of systems an attacker must have tools to compromise.
In a statement released after President Bush's address to the nation, Homeland Security Secretary Tom Ridge said intelligence officials believe terrorists will attempt multiple attacks against U.S. and coalition targets worldwide in the event of a U.S.-led military campaign against Iraq.
If we are to believe the reports published this weekend by three of America's leading newspapers (based on multiple if anonymous sources and semi-confirmed by top intelligence officials), the latest NIE concludes that the war in Iraq is fanning the flames of global terrorism and creating new enemies for the U.S. in the world of Islam.