Originally posted by the Voice of America. Voice of America content is produced by the Voice of America, a United States federal government-sponsored entity, and is in the public domain. Hiker Calls Iranian Detention 'Grueling' VOA News 24 September 2010 Sarah Shourd, one of three Americans arrested and imprisoned in Iran on espionage charges after violating its borders, listens during an interview in New York, 23 Sep 2010 Photo: AP Sarah Shourd, one of three Americans arrested and imprisoned in Iran on espionage charges after violating its borders, listens during an interview in New York, 23 Sep 2010 The American hiker who spent more than 400 days in an Iranian prison is describing the experience as "relentless and grueling." In a U.S. television interview Friday with ABC's Good Morning America, Sarah Shourd said she spent most of her jail time pacing in her small cell, wringing her hands and waiting for the brief periods each day when she was allowed to see fellow hikers Shane Bauer and Josh Fattal. Iranian authorities jailed the trio last year on charges of spying after they crossed into Iran through an unmarked border with Iraq. Iranian authorities freed Shourd last week but Bauer and Fattal remain in custody. In the interview, Shourd said she would be willing to return to Iran for a trial if it would prove that she and the other two hikers committed no crime and meant no harm. However, she added she was not ruling "anything in" or "anything out," at this point. On Sunday, Iranian President Mahmoud Ahmadinejad told ABC Shourd's release was a "huge humanitarian gesture," but Bauer and Fattal would have to face Iranian justice. Shourd told the Associated Press Thursday there were some bright moments during her captivity, including a marriage proposal from Bauer and a surprise cake on her 32nd birthday.  Some information for this report was provided by AP. .