Explanation yes. Convincing explanation no. It could have been caused by balloons. Balloons can't fly at 2000km/h, nor accelerate at 100g, so for the ballon hyp

Explanation yes. Convincing explanation no. It could have been caused by balloons. Balloons can't fly at 2000km/h, nor accelerate at 100g, so for the ballon hypothesis to work you'd have to assume there was also a major malfunction in the two F-16 lock-on systems. You'd also have to assume there was a major failure in the military ground radar system. However, when you make those assumptions, that opens up a can of worms for other possible explanations. Assuming there was sensor system malfunction, the incident could also be explained though a flock of helicopters flying around. Or it could have been several NSA spy planes flying around. I've seen both those explanations put forth as an explanation for what happened in Belgium. I don't believe it's possible to disprove either your balloon hypothesis nor the helicopter hypothesis. There's just not enough evidence to make any convincing explanation.