Yahoo came under renewed scrutiny by federal investigators and lawmakers last month after disclosing the largest known data breach in history, prompting Verizon to demand better terms for its planned purchase. "I can't sit here today and say with confidence one way or another because we still don't know," Marni Walden, president of product innovation and new businesses at Verizon, said at the Citi 2017 Internet, Media & Telecommunications Conference in Las Vegas. AOL was acquired by Verizon in 2015 for $4.4 billion.