Germany probes synagogue suspect, pledges better security

German investigators puzzled Thursday over how the suspect in a botched attack on a synagogue on Judaism's holiest day managed to amass at least 4 kilograms (nearly 9 pounds) of explosives and acquire four firearms, an arsenal they said he planned to use in a massacre.While many questions remain about the suspect, German officials sought to reassure a shaken Jewish community after Wednesday's attack in the eastern city of Halle.The attacker, a German identified by prosecutors as Stephan B., trie