The Tupolev PAK-DA is a Russian stealth bomber that is still in development. PAK-DA is the Russian word for Перспективный авиационный комплекс дальней авиации in Russian (Perspektivnyi Aviatsionnyi Kompleks Dalney Aviatsyi), which means Prospective Air Complex for Long Range Aviation. As of Late 2012, the PAK-DA will be a less ambitious project than the American Next Generation Bomber project in order to maintain the project's affordability.
The PAK-DA will be a stealthy subsonic strategic bomber probably equpped with hypersonic rocket weapons, it's expected to enter service in the 2020-2030 timeframe. Unlike the PAK-FA, it has been speculated that it will follow the stealth design of the F-22 Raptor, B-2 Spirit and F-117 Nighthawk, but there is very little evidence to support this as of 2012.
Long-Range Aviation Commander Lt. Gen. Anatoly Zhikharev has said that an unmanned version of the PAK-DA could enter service around 2040-2050.