Washington (AP) – U.S. officials are scrambling to reinforce the nation’s cyber defenses following a sweeping hack that may have exposed government and corporate secrets to Russia. The breach involving hijacked software from Texas based SolarWinds Inc. has exposed the limitations of the Cybersecurity and Infrastructure Agency. That’s prompted the Biden administration and members of Congress to call for changes at the agency and more money. The administration proposed adding more than 30% to its budget. President Joe Biden, making his first major international speech Friday to the Munich Security Conference, said that dealing with “Russian recklessness and hacking into computer networks in the United States and across Europe and the world has become critical to protecting our collective security.”