CONTENTS. After a radioactive nucleus undergoes an isobaric transition (beta emission, positron emission, or electron capture), it usually contains too much energy to be in its final stable or daughter state. Nuclei in these intermediate and final states are isomers, since they have the same atomic and mass numbers.
In the fall, it was widely reported that people from four U.S. states may need a passport to fly domestically this year. Now, the Department of Homeland Security has increased the list of U.S. locations not offering state driverâs licenses that comply with new federal regulations known as the Real ID Act.
Homeland Security sets Real ID travel deadline for 2018. WASHINGTON â Airline passengers will need more secure driverâs licenses called Real ID starting Jan. 22, 2018, if they want to use them as identification at airport checkpoints, the Department of Homeland Security announced Friday. Driver's licenses will be valid for travel identification in any state until the deadline.