NASA boffin wants FRIKKIN LASERS to propel lightsails

Stop me if you've heard this one "

If you're familiar with the Larry Niven / Jerry Pournelle novel The Mote in God's Eye, get ready for a dose of Di(C)ji vu: a NASA scientist has posted a video on the agency's NASA 360 YouTube channel describing how lasers could send a spacecraft from Earth to Mars in three days."