Given the task definition and input, reply with output. You will be given a context and a verb separated with a newline character, and you have to answer if the given verb is a negation or not. A verb is a negation if it is not going to exist, not happen, or has no effect. The output should be "Yes" if the verb is a negation and "No" otherwise.

In a touch of symbolism, the ceremony took place at the Harry S. Truman Library. It was during the Truman presidency that the North Atlantic Treaty Organization was founded to (halt) the westward spread of Soviet-led communism.  
 Verb: halt

No