Not everything, but they can certainly synchronize some explosions. I was reading an article that was apparently written by a military expert. I had previously mentioned that some believed that mini nukes were used. There didn't seem to be much evidence for the theory, however, so I let it go. However, I just read a fair amount of the following article and now I'm not so sure. Here's an excerpt:
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In video tapes taken of the so-called collapses of the WTC, more explosions of these cutting charges can be seen. The explosions advance quickly, with a gap of a couple of floors, cutting the strong steel pillars in the outer wall. The explosions are timed so that it appears that the tower collapses occur in the same timing as in a gravitational collapse.
The explosions are not completely synchronized in timing, probably a few charges are triggered by radio, and other charges explode out of the impulses of one of these charges (infrared, pressure wave). More challenging problems to the demolition men, however, were the central cores of the buildings and the 47 steel pillars more robust than the ones on the outer rounds. The pillars of the central cores were made of steel even 100 + 100 mm thick, thicker than the side armours of a battle tank. Cutting those, even with explosives, is extremely difficult. One would need to surround the whole pillars, every single pillar on every floor intended to get blasted, with powerful cutting charges. These charges would have needed to be placed in such a way that the users of the skyscrapers could not notice these preparations.
As seen in the following pictures, the cores of the towers were not distracted by thousands of powerful cutting charges but by a modern thermonuclear explosive, a small hydrogen bomb. In the picture below, a hydrogen bomb explosion, the bomb having been placed in the cellar and directed to the core, has reached the roof of the tower and the upper parts of the outer walls. On its way up the waves of fire pressure partially penetrated about 100 floors of concrete and steel. Over ten million degrees of heat caused by a hydrogen bomb sublimised all water within the concrete in a moment. Water exploded extremely quickly into 1000-fold volume and totally pulverized the concrete.
Even people and computers that were in the buildings disappeared turning into heat and light. That is why almost nothing of them was found in the ruins. Burning radiation is absorbed in steel so quickly that steel heats up immediately over its melting point 1585 °C (approx. 2890 °F) and above its boiling point around 3000 C (approx. 5430 °F). In the pictures down below, super hot groups of steel pillars and columns, torn from wall by pressure wave, are sublimized.
They immediately turn into a vaporized form, binding heat as quickly as possible. Bursts upwards, even visible in the picture below, are not possible for a gravitational collapse or for cutting charges which are used horizontally.
From SuanaLahti.net
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http://911lies.org/WTC_collapse_demolition_explosions.html