The drama unfolds in Florida at 4:33 p.m. EDT from the same launch pad at the Kennedy Space Center that sent men to the moon and the last space shuttle into orbit.
The president will travel to Florida for Wednesday's launch, a White House official confirmed on Friday.
Asked about going ahead with the mission in the midst of the pandemic, Behnken told reporters: "Where there's a will, there's a way".
"The essence of the American character is to explore new horizons and to tame new frontiers".More news: Apple may drop EarPods from iPhone 12 box, analyst says
"Our destiny, beyond the Earth, is not only a matter of national identity, but a matter of national security", Trump said in a statement ahead of the visit, which will underline his push for a return to work in the United States amid the coronavirus pandemic.
The curtain rises Wednesday with the scheduled liftoff of SpaceX's Falcon 9 rocket and Crew Dragon capsule, taking two NASA astronauts to the International Space Station - a flight years in the making.
Since 2012, SpaceX has been resupplying the ISS for NASA, thanks to the cargo version of the Dragon capsule. That changes this week with a milestone launch called Demo-2, part of NASA's commercial crew program.
After a successful docking, the astronauts will become members aboard the Expedition 63 crew and assist in performing tests on the Crew Dragon. The capsule was tested in January.More news: In Full 4K UHD on Samsung TV Plus
"SpaceX has gone all out", he said of the capsule.
But his successor sees it as a symbol of his strategy to reassert American domination of space, both military - with his creation of the Space Force - and civilian.
The CPP can then certify Crew Dragon for operational and long-duration missions to the ISS. At the time its camera spotted the rocket, the satellite was about 400 miles (650 kilometers) east of NASA's Kennedy Space Center, soaring over the Atlantic Ocean. The Falcon 9 rocket carrying Crew Dragon is on Pad 39A (center bottom).
"A new era of human spaceflight is set to begin", the space agency said in a statement. That final rehearsal, she said, is meant to make sure "everything is working days before the launch".
"It's great to be in Florida because I'm going to be back in a week, because not too far from here, for the first time in nearly 10 years, we're going to send American astronauts back to space in American rockets from Kennedy Space", Pence told reporters while visiting with Florida Gov. Ron DeSantis on Thursday.More news: Disney Releases 'Out,' Featuring Its First Animated Gay Main Character
"When that rocket goes off next week, it'll remind the American people that even in the midst of the most challenging times, America still moves forward", the vice president told Fox News during an interview at NASA's headquarters in Washington, D.C.