"To the Shores of  Tripoli"- 
Two centuries  ago American ships were beset by seagoing terrorists. These were the Barbary  pirates, freebooters who operated out of bases in North African ports. The  rulers of the North African kingdoms (the Barbary States) tolerated the pirates  (considering it their God given right to do so) for a cut of the loot. Nations  could protect their citizens from pirate attacks by paying large sums of money  (tribute) to the rulers of the North African kingdoms who would then  restrain the pirates. Today, we call this a protection racket. America paid  the tribute for a while, but when asked to pay even more, the cry went up,  millions for defense, not one cent for tribute. In went the US navy and  marines and that was the end of the Barbary pirates. Thus the Marine Corps hymn  contains the line, to the shores of Tripoli.
The situation today is very similar. The pirates are now  terrorists. They are not interested in plunder and enslaving people, but mass  murder and pursuing ideological and religious goals. The most active  international terrorism organization is the Osama Bin Laden group. They take  refuge in Afghanistan, Iran, Iraq and Sudan, not the Barbary States. The main  bases are in Afghanistan, a nation without a seacoast. The Taliban government of  Afghanistan also pleads for international aid to relieve their dire economic  problems, but refuses to have this aid linked with restraining the terrorists in  their territory. The Barbary pirates were allowed to operate for so long because  no one wanted to spend the substantial money required to launch a major military  operation to attack the host nations and shut it down. Eventually America did,  and it worked. But today we have a situation where, for years, America has  protested the sanctuary terrorists are given in some nations. Afghanistan is  currently under UN sanctions for harboring terrorists, but still refuses to take  action. And Afghanistan continues to demand more humanitarian aid. At least  the Barbary States were willing to make deals. So much for progress.
The Osama Bin Laden terrorist  organization has killed more Americans than the Barbary pirates ever did. The  nations that provide refuge for the Bin Laden followers are doing it for  political, religious and ideological reasons, not for money. But Bin Laden also  gets refuge because his exploits are very popular among Moslems, especially in  the Middle East. The reason for this is that, since the Arab peoples achieved  independence over the last 80 years (first from Turkish domination, then from  European colonial rule), they have not been able to establish honest, efficient  governments. Corruption and tyranny is the rule. The people either migrate  (millions have come to America) or turn to Islamic fundamentalism and blaming  the West for all their problems. These Arab grievances refer back to the  Christian crusades of the 12th-14th centuries and a short period of colonial  rule after World War I. Americans forget that in most of the world, people have  long memories. Wrongs (real or imagined) committed centuries ago are the basis  for current hatreds. The closest thing we have to this is when you hear someone  from Alabama complaining about the war and realizing this reference is to the  Civil War of 1861-65.
Ancient  grudges are one thing, combining them with religion is lethal. When youre on a  mission from God, anything is allowed, any means are justified and there are no  limits. At least piracy was something of a profession; you did it for a living,  not to deliberately slaughter civilians and destroy non-military property. The  radical Arab attitude is that Western customs and ideas are polluting Moslems.  Economic progress is not possible until all Western influences are driven out of  Moslem areas. Most Moslems dont agree with this, but they do go along with the  idea that someone else is the cause of all their misery. Unlike the West,  personal responsibility does not extend much beyond family or clan. Islam was  never a fan of democracy. Indeed, the word Islam means submission. While  many of the increasingly better educated population realize that Western  technology and business methods (rule of law and discouraging corruption) will  help Moslem populations without degrading Islam, they are reluctant to speak  out. The radicals have weapons, are willing to use them against dissenters as  well as Westerners, and are generally not opposed. A small portion of the  population is attracted to the radical groups. So we have corrupt leaders  plundering the population from above, while a small number of radicals terrorize  the democratic minded people from below. Many Moslems take a perverse pride in  terrorist acts against non-Moslems. Thus you see public celebrations in Moslem  nations after terrorist acts against non-Moslems. The huge death toll of the  September 11th attacks shocked even those who say they are in favor of suicide  attacks. Celebrations were muted, but they still took place. The radicals were  still jubilant. But most Moslems realize that terrorist attacks only work if  they get media attention and dont enrage the victims into a desire for massive  retaliation. Most Moslems realize the September 11 attacks were over the line  and now America will be out in force looking for blood. Everyone can understand  the desire for revenge after a great wrong has been done. But for the radicals,  death at the hands of the oppressor is a sure way to enter an afterlife  paradise. But pirates are pirates, and in the 19th century, British courts ruled  that pirates could be hunted down and killed when captured. In this sense, what  worked to eliminate the Barbary pirates will work to eliminate terrorists.
September  13, 2001; The September 11 terrorist attacks depended on three things to  succeed. First, the Bin Laden organization was capable of recruiting, screening  and training men capable of carrying out the multiple aircraft hijackings. This  is a difficult and exacting task. But its known that Bin Laden has recruited  many able lieutenants and implemented efficient procedures to support successful  terrorist operations. This requires people with technical and managerial skills  and discipline. The key to a successful operation is thorough reconnaissance  (collecting information), careful planning and willingness to walk away if it  look like it wont work.
Second, unless you have the kind of hyper airport security  the Israelis use, these kinds of hijackings are still possible. Consider that  the September 11 hijackers didnt use guns. They smuggled small knives and  things like box cutters that can be easily hidden the clutter of carry on  luggage. Since these are suicide terrorists, they possess a fierceness that is  difficult for passengers and flight crew to deal with. Back in the 1970s, sky  marshals (armed security personnel) were put on commercial flights. But one sky  marshal would not be a guarantee that half a dozen terrorists could not take  over an aircraft. There will probably be proposals to put even more sturdy doors  on cockpits and something like a small video camera outside the door so the  pilots can see whats happening in the passenger compartment. To institute the  Israeli type of airport security would be very expensive, and objectionable to  some (the profiling would be very hard on anyone who appeared to be Middle  Eastern.)
Third, the internet  and more powerful encryption have made it much easier for terrorists to  communicate. In the past, it was much easier to pick up phone messages or  intercept mail and couriers. But new, industrial strength encryption, easily  available on the internet, makes it much more difficult for US intelligence  organizations to decode terrorist messages. Since there are thousands of  messages captured that might be from terrorists, the longer it takes to crack  them, the more time the terrorists will have to operate undetected. The  combination of disciplined terrorists and secure encrypted internet  communications allows planning to proceed undetected.
Bin Ladens success in the past  has attracted more recruits. His financial resources enables him to maintain  (pay) staff and make payments to the families of suicide terrorists (which also  encourages more recruits.) The success of the September 11th attacks will bring  in more recruits. Bin Ladens training camps in Afghanistan (and other camps in  Iran) continue to operate. As things stand now, more such attacks could be in  the works and ready to be carried out any time in the future. In response, there  probably will be more detailed searches of carry on baggage (and limits on how