She simply did her job, just like all other NSA's....she received foreign National Security intelligence, in order to understand the pertinent security intelligence in full, she needed to know who US PERSON number X is and the NSA had to decide if it was pertinent for her to understand in full, if it was, then THEY unmasked the us person for her and her alone, to see.
Rice requested the info for HERSELF as National Security Advisor if she needed it, and NOT ALL THE BULL CRAP the right wing is LYING ABOUT.....
unmasking a name IS NOT A LEAK....
oh, and since the us person name was masked and she asked for it to be unmasked for her benefit of understanding the intelligence, how could she possibly be asking for all Trump people to be unmasked???
IF THEY WERE MASKED, how did she know who the US person was that she was asking to unveil, asking to be unmasked??