Depends on mirrors. All mirror reflect some wavelengths better than other.
You can have mirrors for specific wavelengths:
Encyclopedia of Laser Physics and Technology - dichroic mirrors, laser mirror
The definition of mirror you are using is too narrow.
That is how mirrors are made. Silicon dioxide in this case is glass. Ordinary glass is molten sand - SiO2. Hafnium dioxide is also transparent solid. Mirror is silver coated glass (Aluminum for cheaper versions). So it is simply a special variety of mirror, but mirror nonetheless!
When did it happened that Indian media hid such news? They have rather been in forefront.
Beware, soon you will have AK47 wielding, suicide vest wearing, Sri Ram shouting Hindus from one end of the world to another, beheading people everywhere..
The question is not who I or you believe. It is who terrorists/extremists choose to believe. And that would be the ones suiting their purpose.
Any way, my post was mild sarcasm, in no way I sympathize with terrorists. Deleted it though.