2016-100MUSD and an plan, for an interstellar probe & laser system. (also a big canon)

Date

https://breakthroughinitiatives.org/initiative/

Breakthrough Starshot aims to demonstrate proof of concept for ultra-fast light-driven nanocrafts, and lay the foundations for a first launch to Alpha Centauri within the next generation. Along the way, the project could generate important supplementary benefits to astronomy, including solar system exploration and detection of Earth-crossing asteroids.