NASA Astronaut Frank Rubio Breaks US Record for Longest Spaceflight

Rubio surpassed previous record of 355 days held by Mark Vande Hei.
Rubio's total time in space will be 371 days before returning to Earth on Sept. 27.
Rubio's stay was extended due to an issue with the Soyuz spacecraft.
The world record is held by a Russian cosmonaut at 437 days.
Rubio's extended time in space provides data on effects of long-duration spaceflight.