 Events this week, including the NATO meeting in Washington, Ukraine, will be a major topic, says ABC's Perry Russom. At the summit, the U.S. is expected to announce new steps to strengthen Ukraine's air defenses and military capabilities, and there will be significant announcements on increasing NATO's military, political, and financial support for Ukraine. On the sidelines of the summit, President Biden will host an event with Ukraine's President Volodymyr Zelensky, along with other NATO leaders.