Terrorist threats
The answer given to this question is partially correct since it gives only about half of the required information to fully answer the question. The answer is well framed though it is more elaborative on a single idea or reason making land attack of terrorists difficult. In fact, the answer explains more about terrorist attacks and how they are executed and not the reason why they are carried out through aircrafts.
Analyzing the answer further, another reason illuminated is the aircraft acting as an explosive itself. This idea is scantly explored though it is one of the main reasons that make aircrafts to be preferred in terrorist attacks. Ease of accessing aircrafts as addressed in the answer article is true though the answer addresses it as if there are no security checks when one is boarding a plane (Hoffman, 2002).
The best fit which is missing in this answer is the way terrorists operate. Of late, they have recruited people from all nationalities in the world. By doing so, they have strengthened their root in the world and have access to very important security information. The other information directly linking aircraft use and terrorist is the speed. Surveillance is all over the world and any alien aircraft in the American space is detected miles away and it is identified. Even if the vessel is alien, the speed at which it propagates gives it an advantage of attack before it is stopped or averted (Hoffman, 2002).
Looking at the organization of terrorists, the answer gives a good eye opener to the people so as to understand why terrorist attacks have become so common. Recruitment of people from all over the world makes curbing terrorists an almost impossible mission since even in the security department, they still have representatives. This makes terrorist attacks even more complicated than earlier perceived.