President Obama said Tuesday that despite differences between the United States and Vietnam over “political philosophy,” the two countries are deepening cooperation on health, climate and other issues. Obama spoke following an Oval Office meeting with Nguyen Phu Trong, the head of Vietnam’s Communist Party. The Taliban mounted two attacks on NATO and Afghan forces in Kabul on Tuesday, killing one Afghan soldier and wounding at least five other people, including four civilians, officials said. Boko Haram attack: A bomb blast in Nigeria’s northern university town of Zaria killed at least 25 people Tuesday including a 2-year-old toddler, the Kaduna state governor reported, the latest in a string of deadly bombing and shooting attacks by the Boko Haram Islamic extremist group. Witnesses said the blast came from a female suicide bomber and that as many as 40 people died. Boko Haram wants to install an Islamic state across Nigeria, a nation of about 170 million people divided between a predominantly Muslim north and Christian south. Starting in May, Carnival Corp.