Mark McClusky says for elite athletes today, pushing boundaries and breaking records is all about "the aggregation of marginal gains."
On Monday, the United Nations Secretary General issued an unexpected invitation to Iran to attend the long-awaited peace conference on Syria. The possible presence of the Iranians infuriated Syrian opposition leaders, who said they would not attend the conference.
However, after opposition groups and the U.S. made their disapproval of the invitation clear, Iran was disinvited and diplomats affirmed the conference will begin in Switzerland on tomorrow. NPR’s Deb Amos joins Here & Now’s Jeremy Hobson with the latest.