Washington: It was an address by a man who appears absolutely clear that his greatest strength is in bringing people together. As US President Joe Biden took his place at the front of the House of Representatives for his first State of the Union speech, his most pressing concern was to bring the chamber to its feet in a poignant gesture of solidarity with the people of Ukraine. "The Ukrainian ambassador to the United States is here tonight," the president said as he launched into the 60-minute address, acknowledging the guest of honor, diplomat Oksana Markarova.