Date of last update: January 20, 2012

1. Recovery of a Deep Ice Core from the West Antarctic Ice Sheet Ice Flow Divide, Amendment No 2 [PGFC0501.AM2]. Signed: 13 October 2010
   
   
2. Use of Conventional Drilling Techniques for Sampling Underlying Brine Lake Vida, McMurdo Dry Valleys, Amendment  No 1 [MCDV0601.IEE.AM1].  Signed: 13 October 2010
   
   
3. NASA Operation Ice Bridge, Antarctica. Signed: 15 October 2010