For millions of Americans, spring weather is making this eclipse a nail-biter: Will clouds spoil their view?
But that's not the case for the roughly 650 balloons being launched today by the Nationwide Eclipse Ballooning Project. The high-altitude balloons are traveling at altitudes anywhere between 70,000 and 115,000 feet. Those altitudes are more than twice that of commercial airlines and far above the cloud tops. (The balloons are also made of biodegradable latex, so they won't harm the environment).
