After three frustrating days of weather delays, the United Launch Alliance Atlas 5 rocket blasted off from Cape Canaveral at 4:44 p.m. EST (2144 GMT) today to send Orbital ATK’s commercial Cygnus cargo freighter to the International Space Station.

NASA’s independent review team that investigated the destruction of a SpaceX Falcon 9 rocket and Dragon supply ship shortly after liftoff in June 2015 concluded a design error led to the loss of more than two tons of provisions and equipment heading for the International Space Station.

Speaking publicly for the first time since a Falcon 9 rocket failure that destroyed a Dragon cargo capsule for the International Space Station, SpaceX founder Elon Musk said Tuesday that engineers are still piecing together what happened during the June 28 accident in hopes of announcing more details within a few days.