Q&A with Mark Sirangelo, leader of Sierra Nevada Space Systems

Wrapping up a two-day pursuit since launching from Cape Canaveral, a SpaceX Dragon supply ship arrived at the International Space Station Monday with more than two tons of cargo and experiments. The automated cargo freighter was captured by the station’s robotic arm at 6:25 a.m. EDT (1025 GMT).

Spare parts warehoused in the the United States and Russia will help Boeing finish assembly of a third space station docking port to receive arriving astronauts aboard Boeing’s CST-100 Starliner and SpaceX’s Crew Dragon capsules, replacing a unit lost in a Falcon 9 launch failure last year.

Leveraging progress made to build a human-rated space plane for NASA’s commercial crew program, Sierra Nevada Corp. said this week it has offered a cargo-carrying version of the Dream Chaser spacecraft to resupply the International Space Station beginning in 2018.