Breaking News from CBS

• Oklahoma tornado: Before and after photos

  A look at Moore, Okla. before and after a deadly tornado passed through

• Video: Could better weather tech predict tornadoes earlier?

  Time Magazine senior writer Bryan Walsh talks about the impact the sequester cuts may have had on the National Weather Service and touches on technological advances that could improve the warning system in advance of tornadoes.

• Oklahoma tornado's strength upgraded to rare EF5

  Damage survey puts twister in strongest class, with winds over 200 mph; search for survivors comes to an end, fire chief says

• Oklahoma tornado: Teachers emerge as heroes

  Teachers credited with saving lives after shielding students with their bodies, directing children to hide under desks

• Power of Okla. tornado surpassed Hiroshima bomb

  National Weather Service upgrades Okla tornado to its top-of-the-scale rating of EF-5, with winds estimated between 200-210 mph