Cricket-Australia declare on 556-4 after Khawaja falls

BRISBANE, Nov 6 (Reuters) - Australia declared their first innings closed on 556 for four after Usman Khawaja was dismissed for 174 on the second day of the opening test against New Zealand at the Gabba on Friday. Captain Steve Smith called time on the innings when Khawaja, who scored his maiden test century as Australia ruthlessly dominated day one, was caught by Martin Guptill off the bowling of Kane Williamson in the second session of the day. Adam Voges, playing his first test on ho