Broncos' Von Miller mum about impending drug suspension

Denver Broncos linebacker Von Miller listens to a question as he and several teammates talked with reporters at the NFL football team's training camp in Englewood, Colo., Wednesday, July 24, 2013. (AP Photo/Brennan Linsley)
Denver Broncos linebacker Von Miller listens to a question as he and several teammates talked with reporters at the NFL football team's training camp in Englewood, Colo., Wednesday, July 24, 2013. (AP Photo/Brennan Linsley)
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