By Guy Faulconbridge LONDON (Reuters) -Russia on Wednesday said it was using a new generation of powerful laser weapons in Ukraine to burn up drones, deploying some of Moscow’s secret weapons to counter a flood of Western arms supplied to its former Soviet neighbour. President Vladimir Putin in 2018 unveiled an array of new weapons including a new intercontinental ballistic missile, underwater nuclear drones, a supersonic weapon and a new laser weapon. Little is known about the specifics of the new laser weapons. Putin mentioned one called Peresvet, named after a medieval Orthodox warrior monk…