May 26, 2017: Hour 1

In hour one of Here & Now's May 26, 2017 full broadcast, Memorial Day weekend kicks off the summer travel season, and visitors will flock to Yellowstone National Park to see the geysers. We take a look at the science behind what makes them erupt. Also, New York City's bike-share program, Citi Bike, turns 4 years old on Saturday. Jay Walder, president and CEO of the company that operates Citi Bike, joins us to talk about lessons learned from the program. And after a frosty meeting with NATO leaders in Brussels, President Trump is now in Sicily meeting with G-7 leaders. NPR White House correspondent Tamara Keith joins us to talk about how Trump is being received at the summit. You can read and hear more at hereandnow.org, follow us on Twitter and join the conversation on Facebook and Tumblr.