You are here. Cross U.S. Borders. Almost a million times each day, U.S. Customs and Border Patrol (CBP) officers welcome international travelers into the U.S. In screening both foreign visitors and returning U.S. citizens, CBP uses a variety of techniques to assure that global tourism remains safe and strong.
Birches are enchanting trees that embody beauty and grace. While most types of Birch trees grow to roughly 40 feet, some, such as the Paper and Yellow Birch can soar to 80 feet tall.irches are enchanting trees that embody beauty and grace. While most types of Birch trees grow to roughly 40 feet, some, such as the Paper and Yellow Birch can soar to 80 feet tall.
Yellow leaves are typical in fall, but not in summer. Birch trees (Betula spp.) add interesting architectural form to your garden landscape. They thrive in U.S. Department of Agriculture plant hardiness zones 5 to 8, though the specific zone varies by species. Most birches produce leaves that yellow and drop in fall. If it's still summer and your birch tree leaves are turning yellow, the tree is telling you it has a problem. Most issues are easily resolved.