Matthew L Wald New York Times

An Air Force passenger jet carrying Michelle Obama to Andrews Air Force Base early Monday evening had to abort its landing and circle the field because it was following too closely on the tail of a giant military cargo plane arriving ahead of it, the Federal Aviation Administration said on Tuesday. The plane carrying the first lady, a military vers...

Japan's nuclear crisis verged toward catastrophe on Tuesday, after an explosion at one crippled reactor damaged its crucial steel containment structure and a fire at another reactor spewed large amounts of radioactive material into the air, according to official statements and industry executives informed about the developments. Fortunately, the pr...

As the scale of Japan's nuclear crisis begins to come to light, experts in Japan and the United States say the country is now facing a cascade of accumulating problems that suggest that radioactive releases of steam from the crippled plants could go on for weeks or even months. The emergency flooding of two stricken reactors with seawater and the r...

Three days after a massive earthquake and tsunami, the Japanese authorities were still struggling on Sunday to avoid full meltdowns at a plant with two stricken reactors on Japan's coast. (See Pics: Japan quake triggers Tsunami)As of Sunday night, technicians' increasingly desperate measures to keep the reactors from overheating, and possibly melti...

Japanese officials struggled on Sunday to contain a quickly escalating nuclear crisis in the aftermath of a devastating earthquake and tsunami, saying they presumed that partial meltdowns had occurred at two crippled reactors, and that they were bracing for a second explosion, even as they appeared to face cooling problems at two more plants and in...

Japanese officials struggled on Sunday to contain a widening nuclear crisis in the aftermath of a devastating earthquake and tsunami, saying they presumed that partial meltdowns had occurred at two crippled reactors and that they were bracing for a second explosion, even as they faced serious cooling problems at four more reactors. (Watch: Explosio...

An explosion at a nuclear power plant in northern Japan on Saturday blew the roof off one building and destroyed the exterior walls of a crippled reactor, but officials said radiation leaks from the plant were receding and that a major meltdown was not imminent. (Watch: Explosion at Fukushima nuclear power plant)Japanese television showed a cloud o...

Japanese officials issued broad evacuation orders on Saturday for people living near two nuclear power plants whose cooling systems broke down as a result of the earthquake. The officials warned that small amounts of radioactive material were likely to leak from the plants. The power plants, known as Daiichi and Daini and operated by Tokyo Electric...

An Air Force passenger jet carrying Michelle Obama to Andrews Air Force Base early Monday evening had to abort its landing and circle the field because it was following too closely on the tail of a giant military cargo plane arriving ahead of it, the Federal Aviation Administration said on Tuesday. The plane carrying the first lady, a military vers...

Japan's nuclear crisis verged toward catastrophe on Tuesday, after an explosion at one crippled reactor damaged its crucial steel containment structure and a fire at another reactor spewed large amounts of radioactive material into the air, according to official statements and industry executives informed about the developments. Fortunately, the pr...

As the scale of Japan's nuclear crisis begins to come to light, experts in Japan and the United States say the country is now facing a cascade of accumulating problems that suggest that radioactive releases of steam from the crippled plants could go on for weeks or even months. The emergency flooding of two stricken reactors with seawater and the r...

Three days after a massive earthquake and tsunami, the Japanese authorities were still struggling on Sunday to avoid full meltdowns at a plant with two stricken reactors on Japan's coast. (See Pics: Japan quake triggers Tsunami)As of Sunday night, technicians' increasingly desperate measures to keep the reactors from overheating, and possibly melti...

Japanese officials struggled on Sunday to contain a quickly escalating nuclear crisis in the aftermath of a devastating earthquake and tsunami, saying they presumed that partial meltdowns had occurred at two crippled reactors, and that they were bracing for a second explosion, even as they appeared to face cooling problems at two more plants and in...

Japanese officials struggled on Sunday to contain a widening nuclear crisis in the aftermath of a devastating earthquake and tsunami, saying they presumed that partial meltdowns had occurred at two crippled reactors and that they were bracing for a second explosion, even as they faced serious cooling problems at four more reactors. (Watch: Explosio...

An explosion at a nuclear power plant in northern Japan on Saturday blew the roof off one building and destroyed the exterior walls of a crippled reactor, but officials said radiation leaks from the plant were receding and that a major meltdown was not imminent. (Watch: Explosion at Fukushima nuclear power plant)Japanese television showed a cloud o...

Japanese officials issued broad evacuation orders on Saturday for people living near two nuclear power plants whose cooling systems broke down as a result of the earthquake. The officials warned that small amounts of radioactive material were likely to leak from the plants. The power plants, known as Daiichi and Daini and operated by Tokyo Electric...