What type of ied was used in the attacks on the nyc world trade center and the alfred murrah federal building in oklahoma city?

The attacks on the NYC World Trade Center on September 11, 2001, involved the use of hijacked airplanes as weapons rather than traditional improvised explosive devices (IEDs). In contrast, the bombing of the Alfred P. Murrah Federal Building in Oklahoma City on April 19, 1995, utilized a truck bomb, which is a type of IED constructed with ammonium nitrate and fuel oil. Both attacks resulted in significant destruction and loss of life, though the methods employed were different.