Given a passage and a question, find the answer to the question based on the passage. The answer should consist of only one word that lies in the span of only one of the sentences in the passage.
Q: Paragraph: Lieutenant Roberts was assigned as Judge Advocate on the USS Seahawk during the beginning of the War on Terrorism in 2002 . He lost a leg trying to save a boy from a field of landmines in Afghanistan that year . He was transferred back to JAG HQ after his operation and proving that he was still able to meet the fitness requirements of the U.S. Navy .
Question: when did bud lose his leg in jag

A: 
2002