--- title: May 25th, 2015 | Vol. 185, No. 19 | U.S. description: Breaking news and analysis from time.com. Politics, world news, photos, video, tech reviews, health, science, and entertainment news. canonical: https://time.com/magazine/us/3858345/may-25th-2015-vol-185-no-19-u-s/ og:title: May 25th, 2015 | Vol. 185, No. 19 | U.S. og:description: Breaking news and analysis from time.com. Politics, world news, photos, video, tech reviews, health, science, and entertainment news. og:url: https://time.com/magazine/us/3858345/may-25th-2015-vol-185-no-19-u-s/ og:site_name: TIME og:image: https://static.time.com/v3/assets/bltea6093859af6183b/bltc79188551a98a77f/6987efa855a8597497a8a17f/final-pot-cover.jpg?branch=production&width=3840&quality=75&auto=webp&crop=16:9 og:image:width: 2363 og:image:height: 1329 og:image:alt: Pot Science Time Magazine Cover 150525 og:type: article twitter:card: summary_large_image twitter:title: May 25th, 2015 | Vol. 185, No. 19 | U.S. twitter:description: Breaking news and analysis from time.com. Politics, world news, photos, video, tech reviews, health, science, and entertainment news. twitter:image: https://static.time.com/v3/assets/bltea6093859af6183b/bltc79188551a98a77f/6987efa855a8597497a8a17f/final-pot-cover.jpg?branch=production&width=3840&quality=75&auto=webp&crop=16:9 --- Back to the vault # May 25, 2015 | Vol. 185 No. 19May 25, 2015 | Vol. 185 No. 19  Issue name May 25th, 2015 | Vol. 185, No. 19 | U.S. Issue date May 25, 2015 Location U.S. Related categories [Science](/vault/subject/science/) [Health & Medicine](/vault/subject/health-medicine/) [Buy This Cover](https://www.timecoverstore.com/) ## Table of Contents BusinessEntertainmentIdeasPoliticsScienceU.S.WorldOthers ### Business [Business](/section/business/) ### Catching Criminals With the Cloud How better software can help the police ### Entertainment [Entertainment](/section/entertainment/) ### David Letterman, Infinite Jester As Late Show ends, its humor has gone viral [Entertainment](/section/entertainment/) ### Jimmy Kimmel: Watching David Letterman 'Was More Important Than Sleep' Kimmel tells TIME about the lasting influence of Late Night [Entertainment](/section/entertainment/) ### Behind the Music in _Pitch Perfect 2_ How the experts chose the right notes [Entertainment](/section/entertainment/) ### _Mad Max_ and the Stronger Sex Eve Ensler lends feminist cred to the new movie ### Ideas [Ideas](/section/ideas/) ### ISIS Is a Danger on U.S. Soil The terrorist group poses a gathering threat [Ideas](/section/ideas/) ### The Graduates When finishing high school is no ordinary rite of passage ### Politics [Politics](/section/politics/) ### No State Left Unturned for Clinton The campaign is focusing on all states, red and blue alike—for now ### Science [Science](/section/science/) ### The Great Pot Experiment Legalization keeps rolling ahead. But because of years of government roadblocks on research, we don’t know nearly enough about the dangers of marijuana—or the benefits [Science](/section/science/) ### In The Latest Issue (14 May 2015) ### U.S. [U.S.](/section/us/) ### Tragedy on the Rails The Amtrak derailment in Pennsylvania prompts a debate on infrastructure and passenger rail travel ### World [World](/section/world/) ### A Disunited Kingdom Britain’s election could mean an unruly exit from the E.U. [World](/section/world/) ### Nepal Digs Out After the Quake Those in the remote mountains face the greatest challenge [World](/section/world/) ### The Panama Canal Gets Grander More than a century after it was built, the waterway grows to take bigger ships [World](/section/world/) ### The Culture (14 May 2015) [World](/section/world/) ### Pop Chart (14 May 2015) [World](/section/world/) ### Dave's Top 10 Greatest Moments. Classics from Late Night and the Late Show [World](/section/world/) ### Dave's Top 10 Guests and Sidekicks [World](/section/world/) ### Milestones (14 May 2015) [World](/section/world/) ### Chris Burden Performance artist [World](/section/world/) ### Briefing (14 May 2015) [World](/section/world/) ### Gobbled Up Verizon's buy [World](/section/world/) ### Obama Struggles to Soothe Saudi Fears As Iran Talks Resume [World](/section/world/) ### Strength and Fortitude ### Others [10 Questions With Penelope LeachThe British child-care guru has written a parenting guide for one difficult experience ](/3858359/10-questions-with-penelope-leach/) May 25th, 2015 | Vol. 185, No. 19 | U.S. ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","name":"Time","url":"https://time.com/","logo":{"@type":"ImageObject","url":"https://time.com/images/logo.png","width":210,"height":60},"foundingDate":"March 3, 1923","sameAs":["https://www.facebook.com/time","https://www.instagram.com/time/?hl=en","https://twitter.com/time","https://www.pinterest.com/timemagazine"]},{"@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://time.com/"},{"@type":"ListItem","position":2,"name":"May 25th, 2015 | Vol. 185, No. 19 | U.S.","item":"https://time.com/magazine/us/3858345/may-25th-2015-vol-185-no-19-u-s/"}]}]} ```