An advertisement for Verizon is seen at Times Square in New York, May 12, 2015. REUTERS/Shannon Stapleton (Reuters) - Verizon Communications Inc's VZ.N chief financial officer Fran Shammo, said the No. 1 U.S. wireless carrier could look at buying Yahoo Inc's YHOO.O core business, which includes Mail, its news and sports sites and advertising technology, if it is a good fit. “If we see there is a s