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- Smith Rock (2022)
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- East San Diego County (10/21)
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- Climbing Devils Tower (7/17)
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- CBS Philly evening news (5/15)
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- In the Needles (7/14)
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- Getting western at Joshua Tree
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- On 20/20 (3/30/12)
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- At the Smithsonian (3/10/12)
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- Ramfication in Algebra and Geometry at Emory (5/11)
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- The integral test
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- Brauer group in Kibbutz Ketura (1/10)
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- Brauer group in Petra (1/10)
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- Special session in Raleigh, NC (4/09)
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- Hyderabad conference (1/09)
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- Brauer Group in Pingree Park, Colorado (2008)
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- Linear algebraic groups and cohomology at Emory (5/07)
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- Wall climbing in Yosemite
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- Ropeless in Joshua Tree
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- In Red Rocks
