Default on debtAlmost assured if Obama is re-elected and the Democrats get a majority or near majority in Congress.
EMP Possible, but a far easier method would be coordinated attacks the nation's electric grid. Remember the 2003 northeast blackout was caused by a single power surge.
Nuclear weaponsIt is almost a certainty that some world city will be destroyed by a nuclear device within the next decade and highly likely it will be a US city destroyed by a terrorist nuke. Pakistan's nuclear arsenal is highly vulnerable to takeover by radical Islamic jihadists and poses a bigger threat than Iran since Pakistan's nukes are already built and tested, in weapons form and numerous.
Bio weapons Possible threat, but with modern methods and medicine they could be contained to limited areas. However mass casualties are still possible.
Demographics Not too likely as the thousands of illegals are fleeing Mexico and may not have much allegiance to a Mexican government.
16 posted on 02/21/2012 6:04:05 AM PST by The Great RJ
("The problem with socialism is that pretty soon you run out of other people's money" M. Thatcher)