Washington International Horse Show CSI 3* Increases Prize Money for 2013   Tuesday Evening to Highlight High Performance Hunters Prize List Featuring Other Enhancements Now Available Online   Washington, DC – July 19, 2013 – The 55th Washington International Horse Show CSI 3* (WIHS) is pleased to announce an increase in the prize money awarded this year in the open jumper and hunter divisions. WIHS will offer nearly half a million dollars in total prize money in 2013, more than a $70,000 boost from 2012! The official prize list for 2013 competition is now available online at wihs.org/prize-list/ , featuring some exciting new changes to the schedule.