US Defense Secretary Chuck Hagel toured China’s lone aircraft carrier on Monday, amid greater insistence from American officials that China be more transparent about its military capabilities, Reuters reported. Chinese security experts say Beijing could be trying to quell US criticism that it was not transparent about its military modernization, which Pentagon officials suspect is aimed at countering US military capabilities. But others said approving the visit was largely a symbolic move; China has still not shown its more sensitive military technologies. The visit comes as tensions between the two countries heighten over Washington’s “strategic pivot” towards Asia.