(Amends language in headline) ANKARA, Turkey, July 7 (Reuters) - U.S. President Donald Trump said he would lift sanctions off Turkey and make a decision on a potential sale of F-35s to Ankara as he began a meeting on Tuesday with Turkish President Tayyip Erdogan at a NATO summit. "We're going to be taking the sanctions off," Trump told reporters when asked about the measures imposed under the Countering America's Adversaries Through Sanctions Act.