 Complete the following phrase:  Choice of a ship for the operation narrowed between Private Jose F. Valdez, then headed from the eastern Mediterranean to Gibraltar, and in port at Abidjan, Ivory Coast. The NSA selected Liberty because she had superior cruising speed 18 knots vs. 8 knots for Private Jose F. Valdez, because her VHFUHF multichannel collection capability was better, and because she was, unlike Private Jose F. Valdez, at the beginning of a deployment. On 23 May 1967 Liberty was diverted for duty in the eastern Mediterranean. Liberty stopped at Rota on 1 June and departed the next day for the eastern Mediterranean. Eastbound Liberty passed westbound Private Jose F. Valdez on the night of June 56. June 7 Contact X Private Jose F. Valdez was Contact A  removed from Libertys navigation chart. Seven days after arriving Rota, Liberty was attacked by Israeli forces and suffered heavy damages, with 34 crew members killed and 171 injured see 