ultra-short laser pulses of up to 100 megawatts, the most powerful of their type ever produced from a human-made system. These pulses last less than a picosecond (a millionth of a millionth of a ...

Buying powerful laser pens could require a licence in future ... He told BBC News: "It's very disconcerting. Most of the [incidents] are at night - and it's distracting. "We (pilots) look outside ...