Boeing's new capsule arrived at the International Space Station on Thursday, delayed by last-minute thruster trouble that almost derailed the docking for this first test flight with astronauts.

The 260-mile-high (420-kilometer-high) linkup over the Indian Ocean culminated more than a day of continuing drama for Boeing's astronaut flight debut carrying NASA test pilots Butch Wilmore and Suni Williams.

Boeing plans to keep Starliner at the space station for at least eight days before guiding it to a landing in the western U.S.

"Nice to be attached to the big city in the sky," Wilmore said once the hooks between the two spacecraft were tight.

Williams entered the space station first, dancing to music on the way in. Wilmore followed, snapping his fingers. They embraced the seven space station residents.

"It was such a great welcome, a little dance party," said Williams. "That's the way to get things going."

The Starliner capsule already had one small helium leak when it rocketed into orbit with two NASA astronauts on Wednesday. Boeing and NASA managers were confident they could manage the propulsion system despite the problem and that more leaks were unlikely. However, just hours into the flight, two more leaks cropped up, and another was discovered after docking.